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XID Services

1225 Weeds

Of The 48 States & Adjacent Canada

An Interactive Identification Guide for Windows

over 6,200 color photos of all 1,225 species
fully illustrated glossary of botanical terminology
the largest Weed Identification reference ever produced for North America
county level distribution maps
page references to over 50 of the most commonly used weed reference books
up-to-date nomenclature and synonymy

more...

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Species

The complete list of species found in the 1,225 Weeds database can be found here. These species are found in at least one of the over 50 weed identification books referenced by the Weeds database (page numbers in these books are cited in the program).

Interactive Plant Identification

Flora ID Northwest – Illustrated XID interactive plant identification databases for All The Native and Naturalized Plants in Washington, Oregon, California, Idaho, Nevada, Utah, Wyoming, Montana, Colorado, North Dakota, South Dakota, Nebraska, Kansas, Minnesota, Wisconsin, Iowa, Arizona, and New Mexico as well as the Canadian provinces of British Columbia, Alberta, Saskatchewan, and Manitoba.

Gallery

The 1,225 Weeds database contains over 6,200 photos. Over 22,000 images can be found in the Gallery. Photos are available for licensing...

Features

The largest Weed Identification reference ever produced for North America.

System requirements: Windows 95 through Windows 10, 1.6GB storage to install (will also run from the USB drive)

Gallery: all remaining species can be viewed simultaneously for comparison. The user can determine the number and size of images to be displayed
Species List Report: the images, data, and references for all remaining species can be scrolled for comparison
Printed Reports: all aspects of the program including species lists, images, menu structure, data etc… are printable
Analysis: Provides the user with a dynamic list of the most efficient menus for the identification process based on steps taken thus far, ease of use, and items remaining in the database
View Data Set: Shows all of the data for any selected species in the database
Show Data Distribution: Shows the relative frequency of characteristics within the database
Descriptive Item Text Fields: Author defined help text for each species
Item Graphics: color photos are incorporated for each species in the database
Context Specific Help Screens: Author defined help text for each characteristic and menu
Characteristic Graphics: Photos or line drawings can be incorporated for each characteristic or menu
List Unusual Characteristic: Shows the most unusual characteristics of any item (compared to those remaining) in descending order
Triggered Pop-Up Taxa: Family, genus, and species are recognized and displayed in scientific databases
Sequential User Reinforcement: The user is shown the number of remaining items after each step
Directed to Page Numbers in Multiple References of Authors Choice: The author can reference the page number in up to 50 references.

Please take the time to view the YouTube tutorial below to see all the features of the software. The tutorial is the same for the DVD and flashdrive versions (you just get more species on the flashdrive).

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There are 16 modules to the tutorial, so it takes about 45 minutes to see all the features of the software.

XID Authoring System

The XID Authoring System allows authors to create their own “smart key” or random access expert system for the identification of any group of species, individuals, or objects, i.e., plants, animals, cars, criminals, etc. The system consists of multi-layered menus in which any attribute can be prioritized and described. The elegant simplicity of the XID System makes it extremely user friendly. It is as useful for the junior high school teacher as for the professional scientist.

As well as creating state-of-the-art identification systems for professional scientists, the XID System provides an excellent vehicle by which to teach classification, taxonomy, logic, and problem solving skills. The authoring system allows students to be involved in the entire process, including selection of subject matter, determination of characters and character states (i.e., color {red, blue, green}), gathering and compiling the data, data entry, error checking, and data correction. Their efforts are strongly reinforced by the final use of the program for the identification of the selected subject matter.

Unlike many of the larger and more cumbersome systems such as DELTA and MEKA, the XID System utilizes state-of-the-art technology. This allows for extreme user friendliness for both the author and end user of the database, as well as maximizing the speed and efficiency of data storage and manipulation. This is why the XID System was chosen by Flora ID Northwest to create the largest comprehensive interactive plant identification database in the world, currently encompassing the entire flora of eighteen states and four Canadian provinces

Characteristic terminology and database items may be graphically represented using line drawings or color photos. In addition, unlike a dichotomous key, which requires a rigid set of steps, the XID System allows the user to randomly select characteristics that are consistent with their specimen and skill level. If the user cannot decide upon a characteristic, they may query the program, which will provide a list of suggestions in order of ease of use and effectiveness, interactively customized to the items remaining.

Applications in which the XID System is being used include the identification of weeds, insects, poisonous plant symptomatology, fishes, rocks and minerals, diseases, gastrotrichs, etc. The XID System can also be used in applications as diverse as assigning health care benefits, personnel selection, research plot evaluation, or any other application where a relational database is required.

As well as the Authoring System, XID Services also markets the weed identification databases created by co-founder Dr. Richard Old, weed identification specialist for Cooperative Extension Service at Washington State University since 1976.

Following are three examples of attempting to identify a dandelion (Taraxacum officinale) from a database of 1,069 species, using sets of three characteristics chosen by different students. Following the examples generated by the three students is an example of using the “analysis” function alone to accomplish the identification. The most efficient method of identification is to first select a few obvious characteristics (as the students have done) and then use the “analysis” function to complete the process. As soon as the database is reduced to a relatively small number of remaining species, the images of these species can be scrolled or displayed simultaneously for comparison.

Student #1
Characteristic Chosen Flower Color: Yellow # of Petals: >10* Flower Width: 1.4 inches*	# of Species Remaining 433 135 38
Student #2
Characteristic Chosen Stem Cross Section: Hollow Juice: Milky Flowering Stem: Leafless	# of Species Remaining 109 16 5
Student #3
Characteristic Chosen Leaf Length: 4 - 8 inches Leaf Arrangement: All Basal Leaf Margin: Lobed	# of Species Remaining 533 57 12
Analysis
Characteristic Chosen Flower Color: Yellow Leaf Width: 0.8 – 1.6 inches # of Petals: >10* Root: Taproot Flower Width: 1.4 inches* Seed Windblown: Yes Juice: Milky Flowering Stem: Leafless Flowering Stem: Unbranched	# of Species Remaining 433 241 75 **50 24 13 7 2 Identified: Dandelion

* Not technically correct but often interpreted in this manner so the data reflects both possible interpretations.

** The message “Family Identified: Asteraceae” appears on the screen at this point.

Note: Although many very technical characteristics are available in the program, those chosen by the analysis function are very similar to those chosen by the students. This is due to two factors: (1) the characteristics chosen by the analysis function are weighted for ease of use, and (2) this function does not mandate a selection, but instead, presents a list of the remaining characteristics in order of effectiveness.

Order

1225 Weeds of the 48 States & Adjacent Canada. On flashdrive

An Interactive Identification Guide

Cost: $49.95
Shipping: $5.00

over 6,200 color photos of all 1,225 species
fully illustrated glossary of botanical terminology
county level distribution maps
page references to over 50 of the most commonly used weed reference books
up-to-date nomenclature and synonymy

More product details.

System requirements: Windows 95 through Windows 10, 1.6 gigabytes to install (will also run from the USB drive)

By using the PayPal “Buy Now” button below, your credit card payment will be processed by PayPal’s secure processing system, or you can pay using funds in your PayPal account. There is no charge to use the PayPal service and you do not need to have or create a PayPal account to use this service. If you do not have a PayPal account: After clicking the “Buy Now” button below, select the box where it says “Pay with a Debit or Credit Card.”

If you wish to order site licenses, photo licensing, the XID Authoring System, pay an existing invoice, or place an order using a purchase order number, please contact sales@xidservices.com. We are happy to ship your order with an invoice if you do not wish to use PayPal.

If you have any questions, phone 1-509-332-2989 or email: info@xidservices.com

References

Upon selection or identification of a species, the weed identification database references the page number where the species images/description appear in any of the following weed identification reference books. The purpose of the program is not to replace your existing reference books, but to make them more easily accessible. Where ever possible the ISBN number is given to facilitate in finding the book (in case the user wants to add the book to their library).

An Illustrated Guide To Arizona Weeds, 1972 (ISBN 0-8165-0288-9)
Aquatic and Riparian Weeds for the West, 2003 (ISBN 1-879906-59-7)
California Growers Weed Identification Handbook, 1968 – 1998 University of California Publication # 4030-1
Common Weeds of Canada, Mulligan 1987 (ISBN 0-910053-59-9)
Common Weeds of the Canadian Prairies, 1963 (Cat# A53-1136-1)
Common Weeds of the United States, 1971 (ISBN 0-486-20504-5)
Common Weed Seedlings of the North Central States, 2001 North Central Regional Extension Publication # 607
Common Weed Seedlings of the United States and Canada, 1978 Coop Ext. Univ. of Georgia, Athens
Field Guide To The Common Weeds Of Kansas, 1983 (ISBN 0-7006-0233-X)
Fifty Important Weeds of Montana, Montana Ag. Ext. Service, 1920.
Garden Weeds of Southern California, 1981
Gilkey`s Weeds of the Pacific Northwest, 1980 (ISBN 0-88246-039-0)
How to Know the Weeds, 1972, (ISBN# 0-697-04880-2)
Identification Guide to the Weeds of Quebec, 1999 (ISBN# 2-89457-174-7)
Identifying Seedling and Mature Weeds (Southeastern US) 1980 North Carolina Agricultural Research Service, Bulletin #461
Manual of Ohio Weeds, 1931 Ohio Ag. Exp. Station Bull. # 475
Nebraska Weeds, 1979 Nebraska Dept. of Ag., Lincoln NE
Nonnative Invasive Plants of Southern Forests 2003, USFS, SRS 62
Northwest Weeds, 1990 (ISBN 0-87842-249-8)
Ontario Weeds, 1992 Agdex 640, Publication #505
Pennsylvania Field Guide, Common Invasive Plants in Riparian Areas, 2004
Representative Missouri Weeds and Their Control, 1941 Univ. of Missouri Ag. Exp Station Bulletin #433
Selected Weeds of Oregon, 1985 and 1989 Supplement (s) Oregon State Dept. of Agriculture
Some Important Michigan Weeds, 1951 Mich. Ag. Exp. Station Bulletin #304
Some Weedy Plants of North Carolina, 1955 North Carolina Ag. Ext. Circular # 390
South Dakota Weeds, 1967 South Dakota State University
South Dakota Weeds 2002 South Dakota Dept. of Ag. 523 E. Capitol, Foss Bldg. Pierre, South Dakota 57501
S.W.S.S. Weed ID Guide, 1993
Weed Seeds of the Great Plains, 1993 University of Kansas# 92-125-B ISBN# 0-7006-0651-3
Weeds, 1955 (1980) Walter Conrad Muenscher, ISBN# 0-8014-1266-8
Weeds, A Golden Guide, 1972 ISBN#0-307-24353-2
Weeds, 1957 Illinois State Dept. of Ag.
Weeds and Poisonous Plants of Wyoming and Utah 1987 (ISBN 0-941570-06-1)
Weeds of Alberta, 1983 Alberta Environmental Centre Agdex 640-4
Weeds of Arkansas 1981 (MP 169-5M-3-81)
Weeds of California, 1970, State of California Publications and Documents.
Weeds of California and other Western States, 2007 (ISBN 13: 978-1-879906-69-3)
Weeds of Canada, 1970 Canada Dept. of Ag., Pub. # 948
Weeds of Colorado, 1990 Cooperative Extension, Colorado State Univ. Bulletin 521A
Weeds of Crops in Southern Arizona, 1958 Arizona Ag. Exp. Station Bulletin #296
Weeds of Eastern Washington and Adjacent Areas, 1972 (LOC 72-83635)
Weeds of Kentucky and Adjacent States, 1991 (ISBN 0-8131-1743-7)
Weeds of Nebraska and the Great Plains, 1994 (ISBN 0939870-00-4)
Weeds of New Jersey, 1929 New Jersey Ag. Exp. Station Circular #219
Weeds of Nova Scotia, 1986 (ISBN# 0-88871-063)
Weeds of Southern Turfgrasses, 1992 Univ. of Florida, Gainesville Publication # SP-79
Weeds of the North Central States, 1981 Univ. of Illinois, Urbana – Champaign Bulletin # 772
Weeds of the Northeast, 1956, Univ. of Delaware Field Manual #1
Weeds of the Northeast, 1997 Cornell University ISBN# 0-8014-8334-4
Weeds of the Northern United States and Canada, 1964 Montgomery
Weeds of the Northern U.S, and Canada, 1999 Royer and Dickinson, (ISBN# 1-55105-221-0)
Weeds of the Prairies, 2000 Alberta Food and Agriculture ISBN# 0-7732-6147-8
Weeds of the Southern United States, 1975, North Carolina Ag. Extension Circular #599
Weeds of the United States and Their Control, Lorenzi 1987, ISBN# 0-442-25884-4
Weeds of the West, 1992 (ISBN 0941570-13-4)
Weeds of the West, 2000 (ISBN 0941570-13-4)
Weeds of Utah, 1971 UAES Special Report 21
Wildly Successful Plants, A Handbook of North American Weeds, 1977 (ISBN# 0-02-528850-4)

Gallery

Using the Gallery

Scientific names are often in flux, and each species is listed only by one scientific name. The XID program allows the users to look up species under either current or obsolete names, but the list shown here gives only one name per species. If you are interested in whether a certain species is contained in the database but can not find its name on this list, it may be because the name has changed. Feel free to contact: info@xidservices.com if you have any questions about whether a certain species appears in the database.

Species are arranged alphabetically by scientific name. Common names have been added to most species, and are searchable as well. Since some scientific names have changed (and will continue to do so), recent synonyms have been added to some species and can be found using “Search” . For example, looking in the alpha listings for Lotus purshianus will yield no results, but a search for Lotus purshianus (or a search for “deer vetch”), will locate the species under its new name: Acmispon americanus.

The gallery contains over 22,000 images of plants in 156 families. Over 99% of these are photos I (about me) have taken over the years. Some species have only one image, others have dozens. There are even a few organisms that are not vascular plants, that I have received questions about for identification. All images are copyrighted and may only be re-used with permission*. Most images are available for commercial use at a resolution of 1,200 X 1,600 or higher, please call 509 332 2989 or Email Me for rates and details. Most images are of “weeds” and poisonous plants, as that is my particular area of interest, but there are a smattering of “wildflowers” and horticultural plants as well, so don’t leap to any assumptions. If you are interested in plants other than weeds, be sure to check out the interactive, fully illustrated keys by Flora ID covering all native and naturalized flora in eighteen western states and four Canadian provinces!

Since my particular field of expertise (and the function of the XID software) is plant identification, most photos focus on diagnostic features for ID, rather than any attempt at aesthetically pleasing photographic qualities.

I welcome all comments, corrections, suggestions, etc. Please Email Me

* There are a few images taken by other photographers that were loaned and are public domain, those images will have the name of the photographer included in the image file name or embedded in the photo. A special thanks to Dr. Joe DiTomaso, author of Weeds of California and Other Western States, an outstanding reference work!

Abelmoschus esculentus

Okra Malvaceae > The mallow family.

Abronia latifolia

yellow sandverbena Nyctaginaceae > The four-o’clock family.

Abronia mellifera

White sand verbena Nyctaginaceae > The four-o’clock family.

Abrus precatorius

Rosary-pea, rosary-bean, prayer-bean. Fabaceae = Leguminosae > The pea family. These highly toxic seeds were used as the beads in rosaries. The specific epithet "precatorius" means "to pray". Interestingly this is also the root word for "precarious," a situation in which one must pray for their well-being!

Abutilon theophrasti

Velvetleaf, China jute, butterprint, buttonweed jute, china mallow, Indian velvetleaf Malvaceae > The mallow family.

Acalypha gracilens

Slender copperleaf, slender threeseed mercury Euphorbiaceae > The spurge family.

Acalypha ostryifolia

Rough-pod copperleaf, hophornbeam copperleaf, pineland threeseed mercury Euphorbiaceae > The spurge family.

Acalypha rhomboidea

Common threeseed mercury Euphorbiaceae > The spurge family.

Acanthospermum australe

bristly star bur, bristly star-bur, bristly starbur, bristly starburr, goathead, goat's head, goat's-head, hispid starrburr, slingshot weed, star burr, starbur, starburr, Texas cockspur, upright star burr, upright starbur Asteraceae = Compositae > The sunflower family.

Acanthus spinosus

Bear's breeches Acanthaceae > The Acanthus family.

Acer circinatum

Vine maple Sapindaceae > The soapberry family (Acer formerly in the Aceraceae).

Acer douglasii

Douglas maple, Rocky Mountain maple, mountain maple = Acer glabrum Sapindaceae > The soapberry family (Acer formerly in the Aceraceae).

Acer macrophyllum

Big-leaf maple Sapindaceae > The soapberry family (Acer formerly in the Aceraceae).

Acer negundo

Box elder, black maple Sapindaceae > The soapberry family (Acer formerly in the Aceraceae).

Acer platanoides

Norway maple Sapindaceae > The soapberry family (Acer formerly in the Aceraceae).

Acer rubrum

Red maple Sapindaceae > The soapberry family (Acer formerly in the Aceraceae).

Acer saccharinum

Silver maple Sapindaceae > The soapberry family (Acer formerly in the Aceraceae).

Achillea millefolium

Yarrow = Achillea lanulosa Asteraceae = Compositae > The sunflower family.

Achillea ptarmica

Sneezewort, sneezeweed Asteraceae = Compositae > The sunflower family.

Acinos arvensis

Basil-thyme = Clinopodium acinos Lamiaceae = Labiatae > The mint family.

Acmispon americanus

American deerweed, deervetch, deer vetch = Lotus purshianus, Lotus unifoliatus Fabaceae = Leguminosae > The pea family.

Aconitum columbianum

Monk's-hood Ranunculaceae > The buttercup family.

Acorus calamus

Sweetflag, calamus, beewort, bitter pepper-root, calamus-root, flag-root, gladdon, myrtle-flag, myrtle-grass, myrtle-root, myrtle-sedge, pine-root, rat-root, sea-sedge, sweet-cane, sweet-cinnamon, sweet-grass, sweet-myrtle, sweet-root, sweet-rush, sweet-sedge Acoraceae > The sweetflag family. Formerly in the Araceae.

Actaea rubra

Red baneberry, cohosh, red cohosh, necklaceweed, snakeberry, poison de couleuvre Ranunculaceae > The buttercup family.

Adenocaulon bicolor

Trail-plant, American trail-plant Asteraceae = Compositae > The sunflower family.

Adonis aestivalis

Pheasant's-eye, summer pheasant's-eye Ranunculaceae > The buttercup family.

Aegilops cylindrica

Jointed goatgrass, goatgrass, Poaceae = Gramineae > The grass family.

Aegilops neglecta

Three-awn goatgrass Poaceae = Gramineae > The grass family.

Aegilops triuncialis

Barbed goatgrass Poaceae = Gramineae > The grass family.

Aegopodium podagraria

Goutweed, Bishop's weed Apiaceae = Umbelliferae > The parsley family.

Aeschynemone indica

budda pea, curly indigo, hard sola, Indian jointvetch, kat sola, northern jointvetch, sensitive jointvetch, sensitive vetch Fabaceae = Leguminosae > The pea family.

Aesculus parviflora

Bottlebrush buckeye Fabaceae = Leguminosae > The pea family.

Agastache foeniculum

Anise hyssop, blue giant-hyssop Lamiaceae = Labiatae > The mint family.

Agastache urticifolia

Nettle-leaf giant hyssop, horse nettle, horse mint Lamiaceae = Labiatae > The mint family.

Ageratina altissima

Snakeroot, white snakeroot Asteraceae = Compositae > The sunflower family.

Agoseris aurantiaca

Orange agoseris, orange mountain-dandelion Asteraceae = Compositae > The sunflower family.

Agoseris compared_with_tragopogon

The smaller heads with the bright white pappus are Agoseris, the larger head with the grayish pappus is Tragopogon. Interestingly, the botanical term for this grayish colored pappus is "sordid", usually used to mean "dirty" in a different context! Dandelion (Taraxacum) has similarly grayish pappus.

Agoseris glauca

Pale agoseris, prairie agoseris, short-beaked agoseris, pale goat-chicory Asteraceae = Compositae > The sunflower family.

Agoseris grandiflora

Mountain dandelion, large-flower goat-chicory, large-flowered agoseris Asteraceae = Compositae > The sunflower family.

Agrimonia pilosa

Hairy agrimony, immortal crane herb Rosaceae > The rose family.

Agropyron cristatum

Crested wheatgrass = Agropyron desertorum Poaceae = Gramineae > The grass family.

Agrostemma githago

Corncockle, common corncockle Caryophyllaceae > The chickweed family.

Agrostis capillaris

Slender bentgrass Poaceae = Gramineae > The grass family.

Agrostis exarata

Spike bentgrass Poaceae = Gramineae > The grass family.

Agrostis gigantea

Redtop, black bentgrass, black bent Poaceae = Gramineae > The grass family.

Ailanthus altissima

Tree-of-heaven Simaroubaceae > The quassia-wood family.

Aira caryophylla

Silver hairgrass, common silver hairgrass Poaceae = Gramineae > The grass family.

Ajuga reptans

Bugle, common bugleweed, bugleweed, carpet bugleweed, carpetweed, carpet bugle Lamiaceae = Labiatae > The mint family.

Akebia quinata

Chocolate vine Lardizabalaceae > The lardizabala family.

Albizia julibrissin

Mimosa, silk tree, silky acacia Fabaceae = Leguminosae > The pea family.

Alhagi maurorum

Camelthorn = Alhagi pseudalhagi, Alhagi camelorum Fabaceae = Leguminosae > The pea family.

Alisma triviale

Water plantain, northern water plantain Alismataceae > The water-plantain family.

Alliaria Compared to Lunaria

Comparison of the leaves of Alliaria petiolata and Lunaria annua. Both Brassicaceae = Cruciferae > The mustard family.

Alliaria petiolata

Garlic mustard Brassicaceae = Cruciferae > The mustard family.

Allium sativum

Cultivated garlic Alliaceae > The onion family. Formerly in the Liliaceae.

Allium vineale

Wild garlic, field garlic, crow garlic, false garlic Alliaceae > The onion family. Formerly in the Liliaceae.

Alloteropsis cimmicina

Bugseed-grass Poaceae = Gramineae > The grass family.

Alnus rubra

Red alder Betulaceae > The birch family.

Alopecurus arundinaceus

Garrison creeping foxtail, creeping foxtail Poaceae = Gramineae > The grass family.

Alopecurus geniculatus

Water foxtail, marsh meadow-foxtail, marsh foxtail Poaceae = Gramineae > The grass family.

Alopecurus myosuroides

Black-grass, black twitch, slender foxtail Poaceae = Gramineae > The grass family.

Alopecurus pratensis

Meadow foxtail Poaceae = Gramineae > The grass family.

Alternanthera philoxeroides

Alligatorweed = Achyranthes philoxeroides Amaranthaceae > The amaranth family.

Alternanthera pungens

Khakiweed = Alternanthera repens, Achyranthes repens Amaranthaceae > The amaranth family.

Alternanthera sessilis

Sessile joyweed,dwarf copperleaf = Achyranthes sessilis, Alternanthera glabra, Gomphrena sessilis Amaranthaceae > The amaranth family.

Althaea rosea

Hollyhock = Alcea rosea Malvaceae > The mallow family.

Alyssum alyssoides

Pale madwort, yellow alyssum Brassicaceae = Cruciferae > The mustard family.

Alyssum desertorum

Desert madwort, desert alyssum Brassicaceae = Cruciferae > The mustard family.

Amaranthus albus

Tumble pigweed Amaranthaceae > The amaranth family.

Amaranthus australis

Southern amaranth Amaranthaceae > The amaranth family.

Amaranthus blitoides

Prostrate pigweed = Amaranthus graecizans Amaranthaceae > The amaranth family.

Amaranthus deflexus

Large-fruit amaranth, low amaranth, Argentina amaranth, perennial pigweed Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Amaranthaceae > The amaranth family.

Amaranthus hybridus

Smooth pigweed, red amaranth, smooth amaranth, green amaranth, slim amaranth Amaranthaceae > The amaranth family.

Amaranthus palmeri

Carelessweed, Palmer amaranth, Palmer pigweed Amaranthaceae > The amaranth family.

Amaranthus powelii

Powell amaranth, Powell pigweed

Amaranthus retroflexus

Redroot pigweed Amaranthaceae > The amaranth family.

Amaranthus spinosus

Spiny amaranth, spiny pigweed Amaranthaceae > The amaranth family.

Amaranthus tuberculatus

Tall waterhemp, roughfruit amaranth Amaranthaceae > The amaranth family.

Amaranthus viridis

Slender amaranth, green amaranth Amaranthaceae > The amaranth family.

Ambrosia acanthicarpa

Spiny bursage Asteraceae = Compositae > The sunflower family.

Ambrosia artemisiifolia

Common ragweed Asteraceae = Compositae > The sunflower family.

Ambrosia chamissonis

Silver bur-ragweed, silver beachweed, silver beachbur, beachbur Asteraceae = Compositae > The sunflower family.

Ambrosia grayi

Woolyleaf bur-ragweed = Franseria tomentosa Asteraceae = Compositae > The sunflower family.

Ambrosia psilostachya

Cuman ragweed, perennial ragweed, western ragweed Asteraceae = Compositae > The sunflower family.

Ambrosia trifida

Giant ragweed, great ragweed, tall ragweed Asteraceae = Compositae > The sunflower family.

Amelanchier alnifolia

Serviceberry, sarviceberry, Juneberry, saskatoon Rosaceae > The rose family.

Ammannia coccinea

Valley redstem, scarlet toothcup, purple ammannia = Ammannia teres Lythraceae > The loosestrife family.

Ammi majus

Bishop's-weed, large bullwort, Bishop's-flower, Queen Anne's Lace (also applied to Daucus carota) Apiaceae = Umbelliferae > The parsley family.

Ammophila arenaria

European beachgrass Poaceae = Gramineae > The grass family.

Amorpha fruticosa

Bastard indigo, false indigo, false indigobush Fabaceae = Leguminosae > The pea family.

Ampelopsis arborea

Peppervine, buckvine, cow-itch Vitaceae > The grape family.

Amphiachyris dracunculoides

Broomweed, prairie broomweed = Xanthocephalum draunculoides, Gutierrezia draunculoides Asteraceae = Compositae > The sunflower family.

Amsinckia lycopsoides

Fiddleneck tarweed, bugloss fiddleneck Boraginaceae > The borage family.

Amsinckia menziesii

Menzie's fiddleneck, rancher's fiddleneck, common fiddleneck, rancher's fireweed = Amsinckia retrorsa Boraginaceae > The borage family.

Amsinckia sp.

Fiddleneck tarweed Boraginaceae > The borage family.

Amsinckia tessellata

Bristly fiddleneck, devil's lettuce Boraginaceae > The borage family.

Anagallis arvensis

Scarlet pimpernel = Lysimachia arvensis Primulaceae > The primrose family.

Anaphalis margaritacea

Pearly everlasting Asteraceae = Compositae > The sunflower family.

Anchusa arvensis

Annual bugloss = Lycopsis arvensis Boraginaceae > The borage family.

Anchusa azurea

Italian bugloss Boraginaceae > The borage family.

Anchusa officinalis

Alkanet, common bugloss Boraginaceae > The borage family.

Andropogon bladhii

Caucasian bluestem = Bothriochloa bladhi Poaceae = Gramineae > The grass family.

Andropogon glomeratus

Bushy bluestem, bushy beardgrass Poaceae = Gramineae > The grass family.

Andropogon saccharoides

Silver beardgrass = Bothriochloa laguroides ssp. torreyana Poaceae = Gramineae > The grass family.

Andropogon virginicus

Broom-sedge Poaceae = Gramineae > The grass family.

Androsace septentrionalis

Pygmyflower rockjasmine Primulaceae > The primrose family.

Anemone berlandieri

tenpetal thimbleweed Ranunculaceae > The buttercup family.

Anemone piperi

Piper’s-anemone, windflower A native wildflower of the forest understory. Ranunculaceae > The buttercup family.

Anethum graveolens

Dill, dillweed Apiaceae = Umbelliferae > The parsley family.

Anthemis austriaca

Austrian mayweed Asteraceae = Compositae > The sunflower family. Only known population in North America, Whitman County WA

Anthemis cotula

Stinking mayweed, stinking chamomile, dogfennel (also applied to Eupatorium capillifolium) Asteraceae = Compositae > The sunflower family.

Anthemis tinctoria

Golden chamomile, golden marguerite, yellow chamomile, oxeye chamomile = Cota tinctoria Asteraceae = Compositae > The sunflower family.

Anthoxanthum odoratum

This species is not part of the Interactive Identification Guide.

Sweet vernalgrass Poaceae = Gramineae > The grass family.

photo of Anthoxanthum odoratum — Anthoxanthum odoratum: Most images are available for commercial use.

Anthriscus caucalis

burr-chervil, burchervil, bur-chervil, bur-beak chervil = Anthriscus scandicina Apiaceae = Umbelliferae > The parsley family.

Anthriscus sylvestris

Wild chervil, cow parsley, wild beaked-parsley Apiaceae = Umbelliferae > The parsley family.

Antirrhinum majus

Snapdragon, large snapdragon, common snapdragon Scrophulariaceae > The snapdragon family.

Apera interupta

Hairgrass, interrupted hairgrass, dense silky-bent Poaceae = Gramineae > The grass family.

Apocynum androsaemifolium

Creeping dogbane Apocynaceae > The dogbane family.

Apocynum cannabinum

Hemp dogbane Apocynaceae > The dogbane family.

Aptenia cordifolia

Heartleaf iceplant, baby sunrose Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Aizoaceae > The ice-plant family.

Arabidopsis thaliana

Thale cress, mouse-ear cress. Sometimes referred to as "the E. coli of the plant world" due to its use in genetic experiments. Brassicaceae = Cruciferae > The mustard family.

Arabis glabra

Tower mustard Brassicaceae = Cruciferae > The mustard family.

Arachis prostrata

Grassnut Fabaceae = Leguminosae > The pea family.

Arceuthobium divaricatum

Pinyon dwarf mistletoe Santalaceae > The sandalwood family. Formerly in the Viscaceae

Arctium lappa

Greater burdock Asteraceae = Compositae > The sunflower family.

Arctium minus

Lesser burdock, common burdock Asteraceae = Compositae > The sunflower family.

Arctium tomentosum

Wooly burdock Asteraceae = Compositae > The sunflower family.

Arctostaphyllos uva-ursi

Bearberry, kinnikinnick Ericaceae > The heath family.

Ardisia crenata

Coralberry, spice berry, scratchthroat Primulaceae > The primrose family.

Arenaria serpyllifolia

Thymeleaf sandwort Caryophyllaceae > The chickweed family.

Argemone albiflora

Bluestem pricklypoppy Papaveraceae > The poppy family.

Argemone mexicana

Mexican poppy, Mexican pricklypoppy Papaveraceae > The poppy family.

Argemone polyanthemos

White pricklypoppy Papaveraceae > The poppy family.

Aristida purpurea

Purple threeawn Poaceae = Gramineae > The grass family.

Aristolochia macrophylla

Dutchman's pipe, pipevine Aristolocaceae > The birthwort family.

Armoracia rusticana

Horse-radish Brassicaceae = Cruciferae > The mustard family.

Arrhenatherum elatius

Tall oatgrass Poaceae = Gramineae > The grass family.

Artemisia absinthium

Absinth, absinth wormwood Asteraceae = Compositae > The sunflower family.

Artemisia annua

Annual wormwood Asteraceae = Compositae > The sunflower family.

Artemisia biennis

Biennial wormwood Asteraceae = Compositae > The sunflower family.

Artemisia campestris

Prairie sagewort, Pacific wormwood, field sagewort Asteraceae = Compositae > The sunflower family.

Artemisia camphorata

Camphor southernwood, southern wormwood Asteraceae = Compositae > The sunflower family.

Artemisia dracunculus

Russian tarragon, dragon sagewort Asteraceae = Compositae > The sunflower family.

Artemisia filifolia

Sand sagebrush, sand sage, sandhill sage Asteraceae = Compositae > The sunflower family.

Artemisia frigida

This species is not part of the Interactive Identification Guide.

Fringed sagebrush, prairie sagewort Asteraceae = Compositae > The sunflower family.

photo of Artemisia frigida — Artemisia frigida: Most images are available for commercial use.

Artemisia ludoviciana

Prairie sage, Louisiana sage, white sagebrush Asteraceae = Compositae > The sunflower family.

Artemisia pontica

Roman wormwood Asteraceae = Compositae > The sunflower family.

Artemisia suksdorfii

Coastal mugwort, coastal wormwood, Suksdorf sagewort Asteraceae = Compositae > The sunflower family.

Artemisia tridentata

Big sagebrush Asteraceae = Compositae > The sunflower family.

Artemisia vulgaris

Mugwort Asteraceae = Compositae > The sunflower family.

Arthraxon hispidum

Hairy jointgrass, small carpgrass Poaceae = Gramineae > The grass family.

Aruncus sylvester

Goat's-beard, eastern goat's-beard, bride’s-feathers = Aruncus dioicus var. vulgaris Rosaceae > The rose family.

Asclepias curassavica

Tropical milkweed, scarlet milkweed, swallow wort, Indian root Asclepiadaceae > The milkweed family.

Asclepias engelmanniana

Engelmann's milkweed Asclepiadaceae > The milkweed family.

Asclepias fascicularis

Narrowleaf milkweed, Mexican whorled milkweed Asclepiadaceae > The milkweed family.

Asclepias humistrata

Pinewoods milkweed Asclepiadaceae > The milkweed family.

Asclepias incarnata

Swamp milkweed, rose milkweed, red milkweed, pleurisy root Asclepiadaceae > The milkweed family.

Asclepias latifolia

Broadleaf milkweed Asclepiadaceae > The milkweed family.

Asclepias pumila

Plains milkweed Asclepiadaceae > The milkweed family.

Asclepias speciosa

Showy milkweed Asclepiadaceae > The milkweed family.

Asclepias syriaca

Common milkweed Asclepiadaceae > The milkweed family.

Asclepias tomentosa

Tuba milkweed Asclepiadaceae > The milkweed family.

Asclepias tuberosa

Butterflyweed, butterfly milkweed Asclepiadaceae > The milkweed family.

Asclepias viridiflora

Green comet milkweed, green milkweed, short green-milkweed Asclepiadaceae > The milkweed family.

Asimina triloba

Pawpaw, paw-paw, papaw Annonaceae > The custard-apple family.

Asparagus densiflorus

Myers asparagus fern = Asparagus aethiopicus Liliaceae > The lily family.

Asparagus officinalis

Asparagus, garden asparagus Liliaceae > The lily family.

Asperugo procumbens

Madwort, catchweed, German madwort Boraginaceae > The borage family.

Asperula odorata

Sweet woodruff Rubiaceae > The madder family.

Aster frondosus

Short-rayed alkali aster = Symphyotrichum frondosum Asteraceae = Compositae > The sunflower family.

Aster occidentalis

Western aster = Symphyotrichum spathulatum Asteraceae = Compositae > The sunflower family.

Astragalus canadensis

Canadian milkvetch Fabaceae = Leguminosae > The pea family.

Astragalus lentiginosus

This species is not part of the Interactive Identification Guide.

Freckled milkvetch, mottled milkvetch Fabaceae = Leguminosae > The pea family.

photo of Astragalus lentiginosus — Astragalus lentiginosus: Most images are available for commercial use.

Astragalus purshii

Woollypod milkvetch, Pursh's milkvetch Fabaceae = Leguminosae > The pea family.

Atriplex canescens

Fourwing saltbush Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Atriplex hortensis

Garden orache Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Atriplex micrantha

Twoscale saltbush, twoscale orache = Atriplex heterosperma Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Atriplex patula

Common orache, spear-scale, spear orach, spear saltbush, ironroot, spreading orache Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Atriplex rosea

Tumbling orache, tumbling saltweed Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Atriplex semibaccata

Australian saltbush Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Atropa belladonna

Belladonna, deadly nightshade, divale, dwale, banewort, devil's-berries, naughty-man's-cherries, death-cherries, beautiful-death, devil's-herb, great-morel, dwayberry, sleeping nightshade. Solanaceae > The nightshade family.

Aurinia saxatilis

Basket-of-gold, rock madwort, goldentuft alyssum, golden alyssum, gold-dust, golden-tuft alyssum, golden-tuft madwort = Alyssum saxatile Brassicaceae = Cruciferae > The mustard family.

Avena barbata

Slender oat Poaceae = Gramineae > The grass family.

Avena fatua

Wild oat Note that "oat" is both the singular and plural form of the word, thus "sewing your wild oats" is grammatically (and often politically) incorrect :) Poaceae = Gramineae > The grass family.

Avena sativa

Oat, cultivated oat Poaceae = Gramineae > The grass family.

Axonopus furcatus

Big carpetgrass Poaceae = Gramineae > The grass family.

Azolla caroliniana

Carolina mosquitofern Salviniaceae > The water-fern family.

Azolla filiculoides

Red azolla, red waterfern Salviniaceae > The water-fern family.

Azolla mexicana

Mexican mosquitofern Salviniaceae > The water-fern family.

Baccharis halimifolia

Eastern baccharis, groundseltree Asteraceae = Compositae > The sunflower family.

Baccharis salicifolia

Great Plains false-willow, mule-fat, seepwillow, water-wally Asteraceae = Compositae > The sunflower family.

Bacopa monnieri

Herb-of-grace, waterhyssop, brahmi, thyme-leafed gratiola, water hyssop, Indian pennywort Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Baileya multiradiata

Desert marigold Asteraceae = Compositae > The sunflower family.

Balduina angustifolia

Coastal plain honeycomb-head Asteraceae = Compositae > The sunflower family.

Ballota nigra

Black horehound Lamiaceae = Labiatae > The mint family.

Balsamorhiza careyana

Carey's balsamroot Asteraceae = Compositae > The sunflower family.

Balsamorhiza sagittata

Arrowleaf balsamroot Asteraceae = Compositae > The sunflower family.

Baptisia australis

Blue wild indigo, blue false indigo Fabaceae = Leguminosae > The pea family.

Barbarea orthoceras

American yellowrocket Brassicaceae = Cruciferae > The mustard family.

Barbarea vulgaris

Winter-cress, common winter-cress, yellowrocket Brassicaceae = Cruciferae > The mustard family.

Bassia hyssopifolia

Five-hook bassia Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae. VERY similar to Bassia scoparia, look for the hooks on the fruits.

Bassia scoparia

Kochia, burningbush, summer cypress = Kochia scoparia Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Batis maritima

Saltwort, turtleweed Bataceae > The saltwort family.

Bebbia juncea

Sweetbush Asteraceae = Compositae > The sunflower family.

Beckmannia syzigachne

Sloughgrass Poaceae = Gramineae > The grass family.

Bellis perennis

English daisy, lawn daisy Asteraceae = Compositae > The sunflower family.

Berberis aquifolium

Oregon-grape, = Mahonia aquifolium Berberidaceae > The barberry family.

Berberis nervosa

Dwarf Oregon-grape, Cascades Oregon-grape, Cascades mahonia, dull Oregon-grape, longleaf mahonia Berberidaceae > The barberry family.

Berberis repens

Creeping Oregon-grape Berberidaceae > The barberry family.

Berberis thunbergii

Japanese barberry Berberidaceae > The barberry family.

Berberis verruculosa

Warty barberry, warted barberry Berberidaceae > The barberry family.

Berberis vulgaris

Common barberry Berberidaceae > The barberry family.

Berlanderia pumila

Soft greeneyes Asteraceae = Compositae > The sunflower family.

Berteroa incana

Hoary alyssum Brassicaceae = Cruciferae > The mustard family.

Berula erecta

Cutleaf waterparsnip Apiaceae = Umbelliferae > The parsley family.

Beta vulgaris

Beet, cultivated beet Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Bidens alba

Shepherd's needles, butterfly needles, beggarticks, Spanish needles = Bidens pilosa Asteraceae = Compositae > The sunflower family.

Bidens aristosa

Bearded beggarticks Asteraceae = Compositae > The sunflower family.

Bidens bipinnata

Spanish-needles Asteraceae = Compositae > The sunflower family.

Bidens cernua

Nodding beggarticks Asteraceae = Compositae > The sunflower family.

Bidens frondosa

Devil's beggarticks Asteraceae = Compositae > The sunflower family.

Bidens mitis

Smallfruit beggarticks Asteraceae = Compositae > The sunflower family.

Bidens pilosa

Hairy beggarticks = Bidens alba Asteraceae = Compositae > The sunflower family.

Blechum pyramidatum

Blackweed, Browne's blechum, green shrimp plant, John bush, yerba-de-papagayo = Ruellia blechum Acanthaceae > The acanthus family.

Boehmeria cylindrica

False nettle, smallspike false nettle Urticaceae > The stinging nettle family.

Boerhavia diffusa

Red spiderling Nyctaginaceae > The four-o’clock family.

Borago officinalis

Borage Boraginaceae > The borage family.

Bothriochloa bladhii

Australian beardgrass = Andropogon bladhii Poaceae = Gramineae > The grass family.

Bouteloua curtipendula

Sideoats grama Poaceae = Gramineae > The grass family.

Bouteloua hirsuta

Hairy grama Poaceae = Gramineae > The grass family.

Bracteantha bracteata

Strawflower, everlasting daisy, golden everlasting Asteraceae = Compositae > The sunflower family.

Brassica elongata

Elongated mustard Brassicaceae = Cruciferae > The mustard family.

Brassica kaber

wild mustard, chadlock, charlock, field mustard = Sinapis arvensis Brassicaceae = Cruciferae > The mustard family.

Brassica nigra

Black mustard Brassicaceae = Cruciferae > The mustard family.

Brassica oleracea

Cabbage, broccoli, cauliflower, kale, Brussels sprouts, collard greens, savoy, kohlrabi, Chinese kale Brassicaceae = Cruciferae > The mustard family.

Brassica rapa

Field mustard, turnip rape, bird rape, keblock, colza Brassicaceae = Cruciferae > The mustard family.

Brassica tournefortii

Sahara mustard, Asian mustard Brassicaceae = Cruciferae > The mustard family.

Briza maxima

Big quakinggrass, great quakinggrass Poaceae = Gramineae > The grass family.

Briza media

Common quakinggrass, perennial quakinggrass Poaceae = Gramineae > The grass family.

Brodiaea douglasii

Wild hyacinth = Tritelia grandiflora Liliaceae > The lily family.

Bromus brizaeformis

Rattlesnake grass, rattlesnake brome Poaceae = Gramineae > The grass family.

Bromus carinatus

California brome, mountain brome Poaceae = Gramineae > The grass family.

Bromus commutatus

Bald brome

Bromus hordeaceus

soft brome = Bromus mollis Poaceae = Gramineae > The grass family.

Bromus inermis

Smooth brome Poaceae = Gramineae > The grass family.

Bromus japonicus

Japanese brome = Bromus arvensis Poaceae = Gramineae > The grass family.

Bromus rigidus

Ripgut brome = Bromus diandrus Poaceae = Gramineae > The grass family.

Bromus rubens

Red brome Poaceae = Gramineae > The grass family.

Bromus squarrosus

Corn brome Poaceae = Gramineae > The grass family.

Bromus sterilis

Sterile brome Poaceae = Gramineae > The grass family.

Bromus tectorum

Downy brome, cheatgrass, broncegrass Poaceae = Gramineae > The grass family.

Bromus vulgaris

Common brome Poaceae = Gramineae > The grass family.

Broussonetia papyrifera

Paper mulberry Moraceae > The mulberry family.

Brugmansia sp.

Angel's-trumpet, angel's-tears Solanaceae > The nightshade family.

Bryonia alba

White bryony Cucurbitaceae > The cucumber family.

Buchloe dactyloides

Buffalograss Poaceae = Gramineae > The grass family.

Buchnera americana

American bluehearts Orobanchaceae > The broom rape family. Formerly in the Scropulariaceae.

Buddleja davidii

Butterfly-bush Scrophulariaceae > The snapdragon family. Formerly in the Buddlejaceae.

Buglossoides arvensis

Corn gromwell, stoneseed gromwell = Lithospermum arvense Boraginaceae > The borage family.

Bulbostylis barbata

Watergrass Cyperaceae > The sedge family.

Butomus umbellatus

Flowering-rush, greater flowering-rush Butomaceae > The flowering-rush family.

Cakile edulenta

American searocket Brassicaceae = Cruciferae > The mustard family.

Cakile maritima

European searocket Brassicaceae = Cruciferae > The mustard family.

Calandrinia ciliata

Redmaids Portulacaceae > The purslane family.

Calendula officinalis

Pot marigold, common marigold, garden marigold, English marigold Asteraceae = Compositae > The sunflower family.

Callicarpa americana

American beauty-berry Lamiaceae = Labiatae > The mint family. Formerly in the Verbenaceae.

Callirhoe involucrata

Purple poppy-mallow Malvaceae > The mallow family.

Callitriche stagnalis

Pond water-starwort Plantaginaceae > The plantain family. Formerly in the Callitrichaceae

Calochortus macrocarpus

Sagebrush mariposa lily, Nez Perce mariposa lily Liliaceae > The lily family.

Caltha palustris

Marsh marigold, kingcup, mayflower, May-blobs, mollyblobs, pollyblobs, horse-blob, water-blobs, water-bubbles, gollins Ranunculaceae > The buttercup family.

Calyptocarpus vialis

Straggler daisy Asteraceae = Compositae > The sunflower family.

Calystegia sepium

Hedge bindweed Convolvulaceae > The morningglory family.

Camassia quamash

Camas, small camas, common camas, camash, quamash Agavaceae > The agave family. Formerly in the Liliaceae.

Camelina microcarpa

Smallseeded falseflax, little-pod faseflax Brassicaceae = Cruciferae > The mustard family.

Camelina sativa

Gold-of-pleasure, false-flax Brassicaceae = Cruciferae > The mustard family.

Campanula glomerata

Clustered bellflower, Dane's-blood Campanulaceae > The bellflower family.

Campanula persicifolia

Harebell, peachleaf bellflower Campanulaceae > The bellflower family.

Campanula rapunculoides

Creeping bellflower Campanulaceae > The bellflower family.

Campanula rotundifolia

bellflower, bluebell bellflower, harebell, lady's thimble, witch's thimble, heathbells, fairies’ thimbles, dead-men’s bells. Campanulaceae > The bellflower family.

Campsis radicans

Trumpet-creeper, cow-itch vine, trumpet vine Bignoniaceae > The trumpet-creeper family.

Cannabis sativa

Marijuana, hemp, weed, Mary Jane, dope, pot, blow, grass, (and many others)! Cannabaceae > The hemp family.

Capsella bursa-pastoris

Shepherd's-purse Brassicaceae > The mustard family.

Caragana arborescens

Siberian peatree, Siberian peashrub Fabaceae = Leguminosae > The pea family.

Cardamine constancii

Constance's bittercress A rare native wildflower species. Brassicaceae = Cruciferae > The mustard family.

Cardamine oligosperma

Little western bittercress, shotweed Brassicaceae = Cruciferae > The mustard family.

Cardamine pensylvanica

Quaker bittercress Brassicaceae = Cruciferae > The mustard family.

Cardaria draba

Heartpod pepperwort, whitetop, hoary cress, whiteweed, peppergrass, heart-podded hoarycress, hoary cardaria = Lepidium draba Brassicaceae = Cruciferae > The mustard family.

Cardaria pubescens

Whitetop, hairy whitetop, ballcress = Lepidium appelianum Brassicaceae = Cruciferae > The mustard family.

Cardionema ramosissima

Heart-thread, sandcarpet, sandmat = Cardionema ramosissima Caryophyllaceae > The chickweed family.

Carduus X

Carduus X orthocephalus Hybrid plumeless thistle. A cross between Carduus acanthoides and Carduus nutans Asteraceae = Compositae > The sunflower family.

Carduus acanthoides

Plumeless thistle Asteraceae = Compositae > The sunflower family.

Carduus nutans

Musk thistle, nodding thistle Asteraceae = Compositae > The sunflower family.

Carduus tenuiflorus

Italian thistle, slenderflower thistle, winged plumeless-thistle Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Asteraceae = Compositae > The sunflower family.

Carex abrupta

Abrupt-beaked sedge, abruptbeak sedge Cyperaceae > The sedge family.

Carex douglasii

Douglas' sedge Cyperaceae > The sedge family.

Carex nebrascensis

Nebraska sedge Cyperaceae > The sedge family.

Carlina acaulis

Stemless carline-thistle Asteraceae = Compositae > The sunflower family.

Carpobrotus edulis

Hottentot-fig, ice-plant, hiway ice-plant Aizoaceae > The ice-plant family.

Carthamus tinctoria

Safflower Asteraceae = Compositae > The sunflower family.

Carum carvi

Caraway, wild caraway, meridian fennel, Persian cumin Apiaceae = Umbelliferae > The parsley family.

Cassia artemisiodes

Feathery cassia Fabaceae = Leguminosae > The pea family.

Cassia phyllodenia

Silver-leaf senna, silver-leaf cassia, silvery senna Fabaceae = Leguminosae > The pea family.

Cassytha filiformis

Love-vine Lauraceae > The laurel family.

Casuarina glauca

Gray she-oak Casuarinaceae > The she-oak family.

Catalpa speciosa

Northern catalpa Bignoniaceae > The trumpet-creeper family.

Catharanthus roseus

Madagascar periwinkle, rosy periwinkle Apocynaceae > The dogbane family.

Ceanothus sanguineus

Redstem ceanothus Rhamnaceae > The buckthorn family.

Ceanothus velutinus

Snowbrush ceanothus, red-root, tobacco brush Rhamnaceae > The buckthorn family.

Celosia argentea

Common cockscomb, crested celosia Amaranthaceae > The amaranth family.

Celtis reticulata

Netleaf hackberry, western hackberry, hackberry, sugarberry, palo blanco Cannabaceae > The hemp family. Formerly in the Ulmaceae

Cenchrus echinatus

Southern sandburr Poaceae = Gramineae > The grass family.

Cenchrus gracillimus

Slender sandburr Poaceae = Gramineae > The grass family.

Cenchrus incertus

Coastal sandburr Poaceae = Gramineae > The grass family.

Cenchrus longispinus

Longspine sandburr Poaceae = Gramineae > The grass family.

Cenchrus tribuloides

Sand-dune sandburr Poaceae = Gramineae > The grass family.

Centaurea cyanus

Bachelor's-button, cornflower Asteraceae = Compositae > The sunflower family.

Centaurea dealbata

Persian cornflower, Persian knapweed, Persian bachelor's-button Asteraceae = Compositae > The sunflower family.

Centaurea diffusa

Diffuse knapweed Asteraceae = Compositae > The sunflower family.

Centaurea macrocephala

Bighead knapweed, lemon-fluff Asteraceae = Compositae > The sunflower family.

Centaurea melitensis

Maltese starthistle Asteraceae = Compositae > The sunflower family.

Centaurea montana

Mountain bluet, mountain cornflower Asteraceae = Compositae > The sunflower family.

Centaurea moschata

Sweet-sultan Asteraceae = Compositae > The sunflower family.

Centaurea solstitialis

Yellow starthistle, Barnaby thistle Asteraceae = Compositae > The sunflower family.

Centaurea stoebe

Spotted knapweed = Centaurea biebersteinii, Centaurea maculosa Asteraceae = Compositae > The sunflower family.

Centaurea trichocephala

Featherhead knapweed Found only once in Yakima County Washington and eradicated Asteraceae = Compositae > The sunflower family.

Centaurea x-moncktonii

Meadow knapweed Apparently erroneously referred to as Centaurea pratensis in many publications (The taxonomy of this large genus is complicated and what was once Centaurea pratensis now = Centaurea jacea) Asteraceae = Compositae > The sunflower family.

Centaurium erythraea

European centaury Gentianaceae > The gentian family.

Centaurium exaltatum

Desert mountain-pink = Zeltnera exaltata Gentianaceae > The gentian family.

Centranthus ruber

Red valerian Valerianaceae > The valerian family.

Centromadia pungens

Spikeweed, spiny false-tarplant = Hemizonia pungens Asteraceae = Compositae > The sunflower family.

Centrosema virginiana

Spurred butterfly-pea Fabaceae = Leguminosae > The pea family.

Cephalanthus occidentalis

Common buttonbush Rubiaceae > The madder family.

Cerastium arvense

Field mouse-ear chickweed Caryophyllaceae > The chickweed family.

Cerastium fontanum

Common mouse-ear chickweed = Cerastium vulgatum Caryophyllaceae > The chickweed family.

Cerastium glomeratum

Sticky mouse-ear chickweed = Cerastium viscosum Caryophyllaceae > The chickweed family.

Cerastium siculum

Forked mouse-ear chickweed

Cerastium tomentosum

Snow-in-summer, snow-on-the-mountain Caryophyllaceae > The chickweed family.

Ceratocephala testiculata

Bur buttercup, curveseed butterwort = Ranunculus testiculatus Ranunculaceae > The buttercup family.

Ceratophyllum demersum

Coon's-tail, coon-tail Ceratophyllaceae > The hornwort family.

Chaenactis carphoclinia

Pebble pincushion Asteraceae = Compositae > The sunflower family.

Chaenactis douglasii

Dusty-maiden, false-yarrow Asteraceae = Compositae > The sunflower family.

Chaenactis fremontii

Morningbride Asteraceae = Compositae > The sunflower family.

Chaenomeles speciosa

Common flowering-quince Rosaceae > The rose family.

Chaenorrhinum minus

Dwarf snapdragon Rosaceae > The rose family. Formerly in the Scrophulariaceae.

Chaerophyllum aureum

Golden chervil Apiaceae = Umbelliferae > The parsley family.

Chaiturus marrubiastrum

Lion's-tail, horehound motherwort = Leonurus marrubiastrum Lamiaceae = Labiatae > The mint family.

Chamaecrista faciculata

Sleeping-plant, partridge-pea Fabaceae = Leguminosae > The pea family.

Chamaenerion angustifolium

Fireweed = Epilobium angustifolium Onagraceae > The evening-primrose family.

Chasmanthium latifolium

Northern sea-oats, inland sea-oats, river-oats, Indian wood-oats = Uniola latifolia Poaceae = Gramineae > The grass family.

Chelidonium majus

This species is not part of the Interactive Identification Guide.

Greater celandine Papaveraceae > The poppy family.

photo of Chelidonium majus — Chelidonium majus: Most images are available for commercial use.

Chenopodium album

Common lamb'squarters Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Chenopodium ambrosioides

Mexicantea = Dysphania ambrosioides Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Chenopodium bonus-henricus

Good King Henry Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Chenopodium botrys

Jerusalem-oak = Dysphania botrys Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Chenopodium capitatum

Strawberry-blite = Blitum capitatum Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Chenopodium glaucum

Oakleaf goosefoot, European oakleaf goosefoot = Oxybasis glauca Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Chenopodium multifidum

Cutleaf goosefoot = Dysphania multifida Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Chenopodium murale

Nettleleaf goosefoot, false nettleleaf goosefoot = Chenopodiastrum murale Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Chenopodium pumilio

Clammy goosefoot = Dysphania pumilo Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Chenopodium rubrum

Red goosefoot, red Eurasian goosefoot = Oxybasis rubra Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Chionodoxa forbesii

Glory-of-the-snow = Scilla forbesii Has, at various times and places, been found in the following families: Asparagaceae, Liliaceae, Hyacinthaceae, Scilloideaea, Chionodoxaceae

Chloris verticillata

Tumble windmillgrass Poaceae = Gramineae > The grass family.

Chloris virgata

Feather windmillgrass Poaceae = Gramineae > The grass family.

Chondrilla juncea

Rush skeletonweed Asteraceae = Compositae > The sunflower family.

Chorispora tenella

Blue mustard, crossflower, purple mustard, musk mustard, beanpodded mustard, tenella mustard Brassicaceae = Cruciferae > The mustard family.

Chrysanthemum coronarium

Crown daisy = Glebionis coronaria Asteraceae = Compositae > The sunflower family.

Chrysothamnus viscidiflorus

Green rabbitbrush Asteraceae = Compositae > The sunflower family.

Cicer arietinum

Chickpea, garbanzo bean Fabaceae = Leguminosae > The pea family.

Cichorium intybus

Chickory, common chickory Asteraceae = Compositae > The sunflower family.

Cicuta bulbifera

Bulbous water-hemlock Apiaceae = Umbelliferae > The parsley family.

Cicuta douglasii

Western water-hemlock Apiaceae = Umbelliferae > The parsley family.

Cicuta maculata

Spotted water-hemlock Apiaceae = Umbelliferae > The parsley family.

Circaea alpina

Enchanter's-nightshade Onagraceae > The evening-primrose family.

Cirsium altissimum

Tall thistle Asteraceae = Compositae > The sunflower family.

Cirsium arvense

Canada thistle Asteraceae = Compositae > The sunflower family.

Cirsium brevifolium

Palouse thistle (a native wildflower) Asteraceae = Compositae > The sunflower family.

Cirsium edule

Edible thistle Asteraceae = Compositae > The sunflower family.

Cirsium horridulum

Yellow thistle Flowers may be yellow or purple. Asteraceae = Compositae > The sunflower family.

Cirsium occidentale

Cobweb thistle, western thistle = Cirsium pastoris Asteraceae = Compositae > The sunflower family.

Cirsium ochrocentrum

Yellow-spine thistle Asteraceae = Compositae > The sunflower family.

Cirsium scariosum

Elk thistle, mountain thistle Asteraceae = Compositae > The sunflower family.

Cirsium undulatum

Wavy-leaf thistle Asteraceae = Compositae > The sunflower family.

Cirsium vulgare

Bull thistle, spear thistle Asteraceae = Compositae > The sunflower family.

Citrullus lanatus

Citron melon Cucurbitaceae > The cucumber family.

Cladonia arbuscula

Reindeer moss (it's really a lichen) This specimen was from low elevation on the Clark Fork River in Montana, not typical habitat...

Clarkia amoena

Farewell-to-spring = Godetia amoena Onagraceae > The evening-primrose family.

Clarkia pulchella

Pink-fairies Onagraceae > The evening-primrose family.

Claytonia arenicola

Sand springbeauty = Montia arenicola Montiaceae > The montia family. Formerly in the Portulacaceae.

Claytonia perfoliata

Miner's-lettuce = Montia perfoliata Montiaceae > The montia family. Formerly in the Portulacaceae.

Claytonia rubra

Red miner's-lettuce = Montia rubra Portulacaceae > The purslane family.

Claytonia sibirica

Siberian miner's-lettuce = Montia sibirica Portulacaceae > The purslane family.

Clematis columbiana

Columbia virgin's-bower Ranunculaceae > The buttercup family.

Clematis ligusticifolia

Western virgin's-bower, white clematis Ranunculaceae > The buttercup family.

Clematis orientalis

Oriental clematis Ranunculaceae > The buttercup family.

Cleome lutea

Yellow beeplant = Peritoma lutea Cleomaceae > The spider-flower family. Formerly in the Capparidaceae.

Cleome serrulata

Rocky Mountain beeplant, stinking-clover, bee spider-flower, skunk weed, Navajo spinach, guaco = Peritoma serrulata Cleomaceae > The spider-flower family. Formerly in the Capparidaceae.

Clinopodium vulgare

Wild basil, field basil Lamiaceae = Labiatae > The mint family.

Cnicus benedictus

Blessed thistle Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Asteraceae = Compositae > The sunflower family.

Cnidoscolus stimulosus

Bull nettle, finger-rot = Cnidoscolus stimulosus

Cobaea scandens

Cup-and-saucer vine, cathedral bells, Mexican ivy, monastery bells, cathedral-bell-flower, batflower Polemoniaceae > The phlox family.

Collinsia parviflora

Blue-eyed-Mary, baby bluelips Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Collomia grandiflora

Large-flowered mountain-trumpet, large-flowered Collomia Polemoniaceae > The phlox family.

Collomia linearis

Narrow-leaf mountain-trumpet Polemoniaceae > The phlox family.

Colocasia esculenta

Elephant-ear, taro Araceae > The arum family.

Colutea arborescens

Bladder senna Fabaceae = Leguminosae > The pea family.

Comandra umbellata

Bastard toadflax, umbellate bastard toadflax, comandra Santalaceae > The sandalwood family.

Commelina communis

Asiatic dayflower Commelinaceae > The spiderwort family.

Commelina erecta

White-mouth dayflower Commelinaceae > The spiderwort family.

Conium maculatum

Poison hemlock Apiaceae = Umbelliferae > The parsley family.

Conoclineum coelestinum

Blue mistflower, wild ageratum Asteraceae = Compositae > The sunflower family.

Conringia orientalis

Hare's-ear mustard Brassicaceae = Cruciferae > The mustard family.

Consolida ajacis

Doubtful knight's-spur Ranunculaceae > The buttercup family.

Convallaria majalis

Lily-of-the-valley Liliaceae > The lily family.

Convolvulus arvensis

Field bindweed Convolvulaceae > The morningglory family.

Conyza bonariensis

Asthmaweed = Erigeron bonariensis Asteraceae = Compositae > The sunflower family.

Conyza canadensis

Mare'stail, horseweed, Canada fleabane = Erigeron canadensis Asteraceae = Compositae > The sunflower family.

Conyza ramosissima

Dwarf horseweed = Erigeron divaricatus Asteraceae = Compositae > The sunflower family.

Coreopsis auriculata

Lobed tickseed Asteraceae = Compositae > The sunflower family.

Coreopsis lanceolata

Lance-leaf tickseed Asteraceae = Compositae > The sunflower family.

Coreopsis leavenworthii

Leavenworth's tickseed Asteraceae = Compositae > The sunflower family.

Coreopsis tinctoria

Golden tickseed Coreopsis tinctoria nar. atkinsoniana = Coreopsis atkinsoniana Asteraceae = Compositae > The sunflower family.

Coriandrum sativum

The seeds are coriander, the leaves are cilantro. Apiaceae = Umbelliferae > The parsley family.

Cornus kousa

Kousa dogwood Cornaceae > The dogwood family.

Cornus stolonifera

This species is not part of the Interactive Identification Guide.

Red osier dogwood, redstem dogwood, red osier = Cornus alba Cornaceae > The dogwood family.

photo of Cornus stolonifera — Cornus stolonifera: Most images are available for commercial use.

Coronopus didymus

Lesser pepperwort = Lepidium didymum Brassicaceae = Cruciferae > The mustard family.

Cortaderia jubata

Jubatagrass Poaceae = Gramineae > The grass family.

Cortaderia sellanoa

Pampasgrass Poaceae = Gramineae > The grass family.

Corydalis micrantha

Smallflower fumewort, southern corydalis, golden corydalis Fumariaceae > The fumitory family.

Corydalis sempervirens

Rock harlequin Fumariaceae > The fumitory family.

Cosmos bipinnatus

Garden cosmos Asteraceae = Compositae > The sunflower family.

Cotinus coggygria

Smoketree, Siberian smoketree Anacardiaceae > The sumac family.

Cotoneaster horizontalis

Rockspray cotoneaster Rosaceae > The rose family.

Cotula australis

Australian brassbuttons Asteraceae = Compositae > The sunflower family.

Cotula coronopifolia

Common brassbuttons Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Asteraceae = Compositae > The sunflower family.

Cotula mexicana

Mexican brassbuttons A weed of golf greens. Asteraceae = Compositae > The sunflower family.

Crambe cordifolia

Greater sea-kale, colewort, heartleaf crambe Brassicaceae = Cruciferae > The mustard family.

Crataegus douglasii

Black hawthorn, Douglas hawthorn Rosaceae > The rose family.

Crataegus monogyna

English hawthorn Rosaceae > The rose family.

Crepis capillaris

Smooth hawk'sbeard Asteraceae = Compositae > The sunflower family.

Crepis nicaeensis

French hawk'sbeard Asteraceae = Compositae > The sunflower family.

Crepis tectorum

Narrowleaf hawk'sbeard Asteraceae = Compositae > The sunflower family.

Cressa truxillensis

Spreading alkaliweed Convolvulaceae > The morningglory family.

Crocosmia X-crocosmiiflora

Crocosmia, montbretia Iridaceae > The iris family.

Crocus angustifolius

Cloth-of-gold Iridaceae > The iris family.

Crocus flavus

Yellow crocus, yellow Dutch-crocus Iridaceae > The iris family.

Crocus vernus

Spring crocus, Dutch-crocus Iridaceae > The iris family.

Crotalaria lanceolata

Lanceleaf rattlebox Fabaceae = Leguminosae > The pea family.

Crotalaria pallida

Smooth rattlebox Fabaceae = Leguminosae > The pea family.

Crotalaria pumila

Low rattlebox Fabaceae = Leguminosae > The pea family.

Crotalaria purshii

Pursh's rattlebox Fabaceae = Leguminosae > The pea family.

Crotalaria spectabalis

Showy rattlebox Fabaceae = Leguminosae > The pea family.

Croton glandulosus

Tooth-leaved croton, tropic croton, sand croton, vente conmigo Euphorbiaceae > The spurge family.

Croton michauxii

Narrow-leaf rushfoil Euphorbiaceae > The spurge family.

Cruciata pedemontana

Foothills bedstraw = Galium pedemontanum Rubiaceae > The madder family.

Crupina vulgaris

Common crupina Asteraceae = Compositae > The sunflower family.

Cryptantha angustifolia

Panamint catseye, bristlelobe cryptantha Boraginaceae > The borage family.

Cryptotaenia canadensis

Canadian honewort, honewort, umbelweed Apiaceae = Umbelliferae > The parsley family.

Cucurbita foetidissima

Buffalo gourd Cucurbitaceae > The cucumber family.

Cuscuta denticulata

Small-tooth dodder Convolvulaceae > The morningglory family. Formerly in the Cuscutaceae.

Cuscuta pentagona

Field dodder, alfalfa dodder, bush-clover dodder Convolvulaceae > The morningglory family. Formerly in the Cuscutaceae.

Cyclachaena xanthifolia

Marshelder, giant marshelder, rag sumpweed, carelessweed, burweed marshelder, false ragweed, horseweed, giant sumpweed = Iva xanthifolia Asteraceae = Compositae > The sunflower family.

Cycloloma atriplicifolium

Winged pigweed Amaranthaceae > The amaranth family.

Cyclospermum leptophyllum

Marsh parsley Apiaceae = Umbelliferae > The parsley family.

Cymbalaria muralis

Kenilworth ivy Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Cymopteris terebithinus

Turpentine spring-parsley Apiaceae = Umbelliferae > The parsley family.

Cynanchum laeve

Honeyvine, honeyvine milkweed, bluevine milkweed, climbing milkweed, smooth swallow-wort Apocynaceae > The dogbane family. Formerly in the Asclepiadaceae.

Cynara cardunculus

Cardoon Asteraceae = Compositae > The sunflower family.

Cynodon dactylon

Bermudagrass Poaceae = Gramineae > The grass family.

Cynoglossum officinale

Hound's-tongue, gypsy-flower Boraginaceae > The borage family.

Cynosurus cristatus

Crested dogtailgrass Poaceae = Gramineae > The grass family.

Cynosurus echinatus

Bristly dogtailgrass Poaceae = Gramineae > The grass family.

Cyperus croceus

Baldwin's flatsedge Cyperaceae > The sedge family.

Cyperus eragrostis

Tall flatsedge Cyperaceae > The sedge family.

Cyperus esculentus

Yellow nutsedge, chufa Cyperaceae > The sedge family.

Cyperus lanceolatus

Lance sedge Cyperaceae > The sedge family.

Cyperus lupulinus

Great Plains flatsedge Cyperaceae > The sedge family.

Cyperus odoratus

Fragrant flatsedge, rusty flatsedge Cyperaceae > The sedge family.

Cyperus retrorsus

Pine-barren sedge Cyperaceae > The sedge family.

Cyperus rivularis

Shining flatsedge = Cyperus bipartitus Cyperaceae > The sedge family.

Cyperus rotundus

Purple nutsedge Cyperaceae > The sedge family.

Cyperus squarrosus

Awned flatsedge = Cyperus squarrosus Cyperaceae > The sedge family.

Cyperus strigosus

Straw-colored flatsedge Cyperaceae > The sedge family.

Cyperus surinamensis

Tropical flatsedge Cyperaceae > The sedge family.

Cyperus virens

Green flatsedge Cyperaceae > The sedge family.

Cypripedium montanum

Mountain ladyslipper orchid Orchidaceae > The orchid family.

Cytisus scoparius

Scotch broom, broomtops, common broom, European broom, Irish broom, English broom Fabaceae = Leguminosae > The pea family.

Dactylis glomerata

Orchardgrass Poaceae = Gramineae > The grass family.

Dactyloctenium aegypticum

Egyptian crow'sfootgrass Poaceae = Gramineae > The grass family.

Dalea enneandra

Nine-anther prairie-clover Fabaceae = Leguminosae > The pea family.

Dalea mollissima

Soft prairie-clover Fabaceae = Leguminosae > The pea family.

Dalea multiflora

Round-head prairie-clover Fabaceae = Leguminosae > The pea family.

Danthonia californica

California oatgrass Poaceae = Gramineae > The grass family.

Daphne cneorum

Rose daphne, garland flower Thymelaeaceae > The mezereon family.

Dasiphora fruticosa

Shrubby cinquefoil Rosaceae > The rose family.

Datura quercifolia

Oakleaf thornapple = Datura ferox Solanaceae > The nightshade family.

Datura stramonium

Jimsonweed Solanaceae > The nightshade family.

Datura wrightii

Sacred datura = Datura inoxia, Datura meteloides Solanaceae > The nightshade family.

Daucus carota

Wild carrot, Queen-Anne's-lace Apiaceae = Umbelliferae > The parsley family.

Delosperma floribunda

Purple ice-plant Aizoaceae > The ice-plant family.

Delosperma nubigenum

Yellow ice-plant Aizoaceae > The ice-plant family.

Delphinium nuttallianum

Nuttall's larkspur, twolobe larkspur Ranunculaceae > The buttercup family.

Deschampsia elongata

Slender hairgrass Poaceae = Gramineae > The grass family.

Descurainia pinnata

Western tansy-mustard Brassicaceae > The mustard family.

Descurainia sophia

Flixweed Brassicaceae > The mustard family.

Desmanthus illinoensis

Illinois bundleflower Fabaceae = Leguminosae > The pea family.

Desmodium canadense

Tick-trefoil, Canadian tick-trefoil, Canada tickclover Fabaceae = Leguminosae > The pea family.

Desmodium incanum

This species is not part of the Interactive Identification Guide.

Creeping beggarweed Fabaceae = Leguminosae > The pea family.

photo of Desmodium incanum — Desmodium incanum: Most images are available for commercial use.

Desmodium tortuosum

Florida beggarweed, Dixie trefoil Fabaceae = Leguminosae > The pea family.

Dianthus armeria

Deptford pink Caryophyllaceae > The chickweed family.

Dicentra formosa

Western bleeding-heart, wild bleeding-heart, Pacific bleeding-heart Fumariaceae > The fumitory family.

Dichanthelium clandestinum

Deer-tongue, deertongue Poaceae = Gramineae > The grass family.

Dichanthelium oligosanthes

Scribner's rosette-grass, Scribner's panicgrass, Scribner panicum, Scribner's panicum, Scribner's panicum Poaceae = Gramineae > The grass family.

Dichondra carolinensis

Carolina Pony's-foot, dichondra Convolvulaceae > The morningglory family.

Digitalis purpurea

Foxglove, purple foxglove Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Digitaria bicornis

Asian crabgrass Poaceae = Gramineae > The grass family.

Digitaria ciliaris

Southern crabgrass, tropical crabgrass summer grass Poaceae = Gramineae > The grass family.

Digitaria ischaemum

Smooth crabgrass Poaceae = Gramineae > The grass family.

Digitaria sanguinalis

Hairy crabgrass Poaceae = Gramineae > The grass family.

Dimorphotheca sinuata

African daisy = Dimorphotheca aurantica Asteraceae = Compositae > The sunflower family.

Diodia virginiana

Virginia buttonweed Rubiaceae > The madder family.

Dioscorea bulbifera

Air-potato, air-potato vine, air yam, bitter yam Dioscoriaceae > The yam family.

Diplolepis rosae

Mossy rose gall. The gall of a small wasp, shown here on Rosa canina.

Dipsacus fullonum

Teasel, fullers teasel = Dipsacus sylvestris Dipsacaceae > The teasel family.

Dipsacus laciniatus

Cut-leaf teasel Dipsacaceae > The teasel family.

Distichlis spicata

Saltgrass Poaceae = Gramineae > The grass family.

Dittrichia graveolens

Stinkwort, Cape khakiweed, stinkweed, camphor inula = Erigeron graveolens, Inula graveolens, Solidago graveolens, Paniopsis graveolens, Asteraceae = Compositae > The sunflower family.

Doronicum orientale

False leopardbane Asteraceae = Compositae > The sunflower family.

Draba nemorosa

Woodland whitlow-grass, woodland draba, woods draba Brassicaceae = Cruciferae > The mustard family.

Draba verna

Spring whitlowgrass, vernal whitlow-grass, spring draba, shadflower, nailwort, common whitlow-grass, early whitlow-grass = Erophila verna Brassicaceae = Cruciferae > The mustard family.

Dryas drummondii

Mountain avens, white dryas, white dryad Rosaceae > The rose family.

Drymaria cordata

Tropical Chickweed, whitesnow, West Indian chickweed, chickweed, drymaria, heartleaf drymary Caryophyllaceae > The chickweed family.

Duchesnea indica

Indian strawberry, mock strawberry Rosaceae > The rose family.

Dyschoriste oblongifolia

Twinflower, oblong-leaf snakeherb Acanthaceae > The acanthus family.

Echinacea purpurea

Purple coneflower, easter purple coneflower Asteraceae = Compositae > The sunflower family.

Echinochloa colona

Jungle rice, awnless barnyardgrass Poaceae = Gramineae > The grass family.

Echinochloa crus-galli

Barnyardgrass, cockspurgrass, Japanese millet, zacate de agua Poaceae = Gramineae > The grass family.

Echinochloa walteri

Coast cock's-spur grass Poaceae = Gramineae > The grass family.

Echinocystis lobata

Wild cucumber, prickly cucumber, balsam apple Cucurbitaceae > The cucumber family.

Echium plantagineum

Salvation Jane, blueweed, Lady Campbell weed, riverina bluebell, purple viper's bugloss Boraginaceae > The borage family.

Echium vulgare

Viper's bugloss, blue devil, blue echium, blue thistle, blue-weed, blueweed, common viper's bugloss, common viper's bugloss Boraginaceae > The borage family.

Eclipta prostrata

False daisy, trailing eclipta Asteraceae = Compositae > The sunflower family.

Egeria densa

Brazilian elodea, egeria, leafy elodea, dense waterweed, Brazilian waterweed, anacharis = Anacharis densa, Elodea canadensis var. gigantea, Elodea densa Hydrocharitaceae > The tape-grass family.

Eichornia crassipes

Water-hyacinth, common water-hyacinth, floating water-hyacinth Pontederiaceae > The pickerelweed family.

Elaeagnus angustifolia

Russian olive Elaeagnaceae > The oleaster family.

Elaeagnus commutata

Wolf willow, silverberry, American silverberry Elaeagnaceae > The oleaster family.

Elaeagnus multiflora

Goumi, cherry silverberry, cherry elaeagnus Elaeagnaceae > The oleaster family.

Elaeagnus umbellata

Autumn olive, Elaeagnus, oleaster, Japanese silverberry Elaeagnaceae > The oleaster family.

Eleocharis acicularis

Needle spikerush, dwarf hairgrass Cyperaceae > The sedge family.

Eleusine indica

Goosegrass, manienie ali'i, wiregrass Poaceae = Gramineae > The grass family.

Elodea canadensis

Canadian waterweed, common elodea, anacharis, that aquarium plant Hydrocharitaceae > The tape-grass family.

Elymus canadensis

Canada wild-rye Poaceae = Gramineae > The grass family.

Elymus cinereus

Columbia Basin wild-rye Poaceae = Gramineae > The grass family.

Elymus glaucus

Blue wild-rye Poaceae = Gramineae > The grass family.

Elymus repens

Quackgrass, common couch, twitch, quickgrass, quitchgrass, chiendent Poaceae = Gramineae > The grass family.

Elytrigia elongata

Tall wheatgrass Poaceae = Gramineae > The grass family.

Emex spinosa

Devil's-thorn, spiny threecornerjack Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Polygonaceae > The rhubarb family.

Emilia fosbergii

Florida tasselflower, Flora's paintbrush, Florida tassel-flower Asteraceae = Compositae > The sunflower family.

Emilia sonchifolia

Lilac tasselflower, cupid's shaving-brush Asteraceae = Compositae > The sunflower family.

Encelia farinosa

Brittlebush, brittlebrush, goldenhills, incienso Asteraceae = Compositae > The sunflower family.

Engelmannia pinnatifida

Engelmann's daisy, cutleaf daisy Asteraceae = Compositae > The sunflower family.

Epilobium brachycarpum

Panicle willow-weed, tall willowherb, tall annual willowherb, panicled willowherb = Epilobium paniculatum Onagraceae > The evening-primrose family.

Epilobium canum

California-fuchsia, hummingbird flower, hummingbird trumpet, firechalice. = Zauschneria californica Onagraceae > The evening-primrose family.

Epilobium ciliatum

American willowherb, fringed willowherb, Watson's willow-weed = Epilobium adenocaulon, Epilobium watsonii Onagraceae > The evening-primrose family.

Epilobium densiflorum

Denseflower willowherb, dense spike-primrose, dense boisduvalia = Boisduvalia densiflora Onagraceae > The evening-primrose family.

Epilobium hirsutum

Hairy willow-herb, hairy willow-herb, codlins and cream, European fireweed, great willow-herb Onagraceae > The evening-primrose family.

Epipactis gigantea

Giant helleborine A native orchid, Snake River canyon, Whitman County WA Orchidaceae > The orchid family.

Equisetum arvense

Field horsetail Equisetaceae > The horsetail family.

Equisetum fluviatile

Water horsetail Equisetaceae > The horsetail family.

Equisetum hyemale

Tall scouring-rush Equisetaceae > The horsetail family.

Equisetum laevigatum

Smooth scouring-rush Equisetaceae > The horsetail family.

Equisetum palustre

Marsh horsetail Equisetaceae > The horsetail family.

Equisetum telmateia

Giant horsetail Equisetaceae > The horsetail family.

Eragrostis barrelieri

Mediterranean lovegrass Poaceae = Gramineae > The grass family.

Eragrostis cilianensis

Stinkgrass, candy grass, gray lovegrass Poaceae = Gramineae > The grass family.

Eragrostis curvula

Weeping lovegrass, Boer lovegrass, curved lovegrass, Catalina lovegrass, African lovegrass Poaceae = Gramineae > The grass family.

Eragrostis minor

Little lovegrass Poaceae = Gramineae > The grass family.

Eragrostis pectinacea

Purple lovegrass, slender lovegrass, small lovegrass, Carolina lovegrass, tufted lovegrass Poaceae = Gramineae > The grass family.

Eranthis hyemalis

Winter aconite, winter hellebore, winter wolf's-bane Ranunculaceae > The buttercup family.

Eremocarpus setigerus

Turkey mullein, doveweed = Croton setiger (often Croton setigerus) Euphorbiaceae > The spurge family.

Eremopyrum triticeum

Annual wheatgrass, annual false wheatgrass = Agropyron triticeum Poaceae = Gramineae > The grass family.

Ericameria nauseosa

Gray rabbitbrush = Chrysothamnus nauseosus Asteraceae = Compositae > The sunflower family.

Erigeron philadelphicus

Philadelphia fleabane Asteraceae = Compositae > The sunflower family.

Erigeron quercifolius

Oakleaf fleabane Asteraceae = Compositae > The sunflower family.

Erigeron strigosus

Prairie fleabane, lesser daisy-fleabane,plains fleabane, daisy-fleabane Asteraceae = Compositae > The sunflower family.

Eriogonum fasciculatum

California buckwheat, Eastern Mojave buckwheat Polygonaceae > The rhubarb family.

Eriogonum heracleoides

Parsnip-flowered buckwheat Polygonaceae > The rhubarb family.

Eriogonum niveum

Snowy buckwheat Polygonaceae > The rhubarb family.

Eriogonum vimineum

wickerstem buckwheat Polygonaceae > The rhubarb family.

Eriophorum vaginatum

Cotton-grass, hare's-tail cottongrass, tussock cottongrass, sheathed cottonsedge Cyperaceae > The sedge family.

Eriophyllum lanatum

Oregon sunshine, wooly sunflower, common wooly sunflower Asteraceae = Compositae > The sunflower family. The scientific name translates "wooly wool-leaf"

Erodium brachycarpum

shortfruit stork's-bill, short-fruited filaree Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Geraniaceae > The geranium family.

Erodium cicutarium

Redstem filaree, common crowfoot, common heron's-bill, common stork's-bill, cutleaf erodium, cut-leaf heron's-bill, heron's-bill, pin clover, pin grass, pin weed, redstem stork's-bill, stork's-bill Geraniaceae > The geranium family.

Erodium moschatum

Whitestem filaree, filaree, heron's bill, musk clover, musk filaree, musk heron's bill, musk stork's bill, musk storksbill, musky crowfoot, musky heron's bill, musky heron's-bill, musky stork's bill, musky storksbill, storksbill, white stemmed filaree, whitestem storksbill, white-stemmed filaree, musky stork's-bill Geraniaceae > The geranium family.

Eruca vesicaria

Garden rocket, rocket salad, arugula Brassicaceae = Cruciferae > The mustard family.

Erucastrum gallicum

Hairy rocket, common dogmustard Brassicaceae = Cruciferae > The mustard family.

Eryngium oliverianum

Oliver's eryngo, sea holly Apiaceae = Umbelliferae > The parsley family.

Erysimum capitatum

Western wallflower, coast wallflower, sand dune wallflower Brassicaceae = Cruciferae > The mustard family.

Erysimum cheiranthoides

Wallflower mustard, worm-seed mustard, worm-seed wallflower, treacle mustard Brassicaceae = Cruciferae > The mustard family.

Erysimum inconspicuum

Small-flowered prairie-wallflower, small-flowered wallflower, shy wallflower Brassicaceae = Cruciferae > The mustard family.

Erysimum repandum

Spreading wallflower, bushy wallflower, treacle mustard Brassicaceae = Cruciferae > The mustard family.

Erythronium grandiflorum

yellow avalanche lily, glacier lily, dogtooth fawn lily, dogtooth lily, dogtooth violet Liliaceae > The lily family.

Eschscholzia californica

California poppy, California sunlight, cup-of-gold, golden-cup Papaveraceae > The poppy family.

Eucalyptus microtheca

Myrtaceae > The myrtle family. Coolibah, flooded-box

Euclidium syriacum

Syrian mustard Brassicaceae = Cruciferae > The mustard family.

Eupatorium album

White thoroughwort Asteraceae = Compositae > The sunflower family.

Eupatorium capillifolium

Dogfennel Asteraceae = Compositae > The sunflower family.

Eupatorium leptophyllum

False fennel, limesink dogfennel Asteraceae = Compositae > The sunflower family.

Eupatorium maculatum

Spotted trumpetweed, gravelweed, Joe-pye weed, jopi-weed, Queen-of-the-meadow root, kidneyroot, purple boneset, Asteraceae = Compositae > The sunflower family.

Euphorbia albomarginata

Rattlesnake weed white-margin broomspurge, whitemargin sandmat, whitemargin spurge Euphorbiaceae > The spurge family.

Euphorbia cyathophophora

Painted Euphorbia, Mexican fireplant, Japanese poinsettia, desert Poinsettia, wild Poinsettia, Fire-on-the-mountain, paintedleaf, painted spurge Euphorbiaceae > The spurge family.

Euphorbia cyparissias

Cypress spurge Euphorbiaceae > The spurge family.

Euphorbia dentata

Toothed spurge Euphorbiaceae > The spurge family.

Euphorbia esula

Leafy spurge Euphorbiaceae > The spurge family.

Euphorbia exserta

Coastal sand-spurge, coastal spurge Euphorbiaceae > The spurge family.

Euphorbia glyptosperma

Corrugate-seed broomspurge, ridgeseed sandmat, ridgeseed spurge Euphorbiaceae > The spurge family.

Euphorbia heterophylla

A plant of extremely variable morphology, the common names the same as those of Euphorbia cyathophora: Painted Euphorbia, Mexican fireplant, Japanese poinsettia, desert Poinsettia, wild Poinsettia, Fire-on-the-mountain, paintedleaf, painted spurge Euphorbiaceae > The spurge family.

Euphorbia hypericifolia

Large spotted-spurge, graceful spurge, black purslane, beach spurge, graceful sandmat, garden spurge, milk purslane, eye-bright, flux-weed Euphorbiaceae > The spurge family.

Euphorbia hyssopifolia

Hyssop-leaf sandmat Euphorbiaceae > The spurge family.

Euphorbia lathyris

Caper spurge, caperspurge, gopher plant, gopher spurge, caper bush, gopherplant, mole plant, mole weed, moleplant, sunburn plant, spring wort, wild caper Euphorbiaceae > The spurge family.

Euphorbia maculata

Spotted Spurge, blotched spurge, spotted sandmat Euphorbiaceae > The spurge family.

Euphorbia marginata

Snow-on-the-mountain, smoke-on-the-prairie, whitemargined spurge, variegated spurge Euphorbiaceae > The spurge family.

Euphorbia myrsinites

Myrtle spurge, creeping spurge, donkey-tail Euphorbiaceae > The spurge family.

Euphorbia peplus

Petty spurge Euphorbiaceae > The spurge family.

Euphorbia serpyllifolia

Thymeleaf sandmat, thyme-leafed spurge Euphorbiaceae > The spurge family.

Euphorbia terracina

Terracina spurge, false caper, carnation spurge, Geraldton carnation-weed, Euphorbiaceae > The spurge family.

Euphrasia nemorosa

Eyebright, common eyebright, eyewort Orobanchaceae (formerly in the Scrophulariaceae > The figwort family.

Eustachys petraea

Pinewoods fingergrass Poaceae = Gramineae > The grass family.

Euthamia caroliniana

Slender goldentop, slender flat-topped goldenrod = Solidago caroliniana Asteraceae = Compositae > The sunflower family.

Euthamia graminifolia

Flat-top goldenrod = Solidago graminifolia Asteraceae = Compositae > The sunflower family.

Euthamia occidentalis

Western goldenrod = Solidago occidentalis Asteraceae = Compositae > The sunflower family.

Fagopyrum esculentum

Cultivated buckwheat Polygonaceae > The rhubarb family.

Fallopia bohemica

Bohemian knotweed Polygonaceae > The rhubarb family.

Fallopia japonica

Japanese knotweed Polygonaceae > The rhubarb family.

Fatoua villosa

Mulberryweed, crab weed, hairy crabweed Moraceae > The mulberry family.

Ficus carica

Common fig, fig, fig tree Moraceae > The mulberry family.

Fimbristylis cymosa

Cymose fimbry, fimbry Cyperaceae > The sedge family.

Fimbristylis spathacea

Button sedge, tropical fimbry Cyperaceae > The sedge family.

Foeniculum vulgare

Fennel Apiaceae = Umbelliferae > The parsley family.

Forsythia syringa

Forsythia Oleaceae > The olive family.

Fragaria chiloensis

This species is not part of the Interactive Identification Guide.

Beach strawberry, Pacific beach strawberry, Sandwich beach strawberry Rosaceae > The rose family.

photo of Fragaria chiloensis — Fragaria chiloensis: Most images are available for commercial use.

Fragaria virginiana

Wild strawberry Rosaceae > The rose family.

Frangula alnus

Glossy buckthorn, European alder buckthorn = Rhamnus frangula Rhamnaceae > The buckthorn family.

Frankenia salina

Alkali heath, alkali seaheath Frankeniaceae > The seaheath family.

Froelichia floridana

Cottontails, snake-cotton, field snake-cotton Amaranthaceae > The amaranth family.

Fuchsia magellanica

Fuchsia, lady's eardrops, fuchsia angel earrings, earring lower, hardy Fuchsia Onagraceae > The evening-primrose family.

Fuirena briviseta

Saltmarsh umbrella-sedge Cyperaceae > The sedge family.

Fumaria officinalis

Fumitory, common fumitory, drug fumitory, earth smoke Fumariaceae > The fumitory family.

Gagea villosa

This species is not part of the Interactive Identification Guide.

Hairy star-of-Bethleham The only record in North America from Whitman County WA.

photo of Gagea villosa — Gagea villosa: Most images are available for commercial use.

Gaillardia aristata

Blanket flower Asteraceae = Compositae > The sunflower family.

Galactia elliotii

Elliot's milkpea Fabaceae = Leguminosae > The pea family.

Galactia volubilis

Downy milkpea Fabaceae = Leguminosae > The pea family.

Galanthus nivalis

Snowdrops Amaryllidaceae > the amaryllis family. Formerly in the Liliaceae.

Galega officinalis

Goat's-rue, professor-weed, French lilac, Italian fitch, galega Fabaceae = Leguminosae > The pea family.

Galinsoga quadriradiata

Shaggy soldier, hairy galinsoga, fringed quickweed Asteraceae = Compositae > The sunflower family.

Galinsoga sp.

Gallant soldier Asteraceae = Compositae > The sunflower family.

Galiopsis tetrahit

Common hemp-nettle, brittlestem hempnettle Lamiaceae = Labiatae > The mint family.

Galium aparine

cleavers, goosegrass, catchweed, stickyweed, robin-run-the-hedge, sticky willy, sticky willow, velcro weed, grip grass, clivers Rubiaceae > The madder family.

Galium boreale

Northern bedstraw Rubiaceae > The madder family.

Galium concinnum

Shining bedstraw Rubiaceae > The madder family.

Galium divaricatum

Lamarck's bedstraw Rubiaceae > The madder family.

Galium mollugo

Hedge bedstraw, false baby's breath, smooth bedstraw, wild madder Rubiaceae > The madder family.

Galium uniflorum

Oneflower bedstraw Rubiaceae > The madder family.

Galium verum

Yellow bedstraw, yellow spring bedstraw Rubiaceae > The madder family.

Gamochaeta purpurea

Purple cudweed, spoonleaf purple everlasting Asteraceae = Compositae > The sunflower family.

Gaultheria shallon

Salal Ericaceae > The heath family.

Gelsemium sempervirens

Yellow jessamine, yellow jasmine, gelsemium, Carolina jasmine or jessamine, evening trumpetflower, woodbine Gelsemiaceae > The jasmine family.

Geranium carolinianum

Carolina geranium, Carolina crane'sbill Geraniaceae > The geranium family.

Geranium dissectum

Cutleaf geranium Geraniaceae > The geranium family.

Geranium lucidum

Shining geranium Geraniaceae > The geranium family.

Geranium pusillum

Small geranium, small-flowerd crane'sbill Geraniaceae > The geranium family.

Geranium robertianum

Herb-Robert, Red Robin, Death come quickly, Stork'sbill, Dove's Foot, Crow's Foot, Robert's Geranium, stinky Bob Geraniaceae > The geranium family.

Geranium viscosissimum

Sticky geranium (a native wildflower) Geraniaceae > The geranium family.

Geum canadense

White avens Rosaceae > The rose family.

Geum macrophyllum

Large-leaf geum Rosaceae > The rose family.

Geum urbanum

Wood avens, Old man's whiskers, herb Bennet, Bennet's Root Rosaceae > The rose family.

Gilia capitata

Globe gilia, bluehead gilia, blue field gilia, bluehead gily-flower Polemoniaceae > The phlox family.

Glechoma hederacea

Ground-ivy, gill-over-the-ground, creeping charlie, field balm, alehoof, tunhoof, catsfoot, run-away-robin = Nepeta hederacea Lamiaceae = Labiatae > The mint family.

Gleditsia triacanthos

Honey locust Fabaceae = Leguminosae > The pea family.

Glycine max

Soybean Fabaceae = Leguminosae > The pea family.

Glycyrrhiza lepidota

Wild licorice, American licorice Fabaceae = Leguminosae > The pea family.

Gnaphalium chilense

Cotton-batting Plant = Pseudognaphalium stramineum Asteraceae = Compositae > The sunflower family.

Gnaphalium luteo-album

Everlasting cudweed, fragrant everlasting, common cudweed, weedy cudweed, Jersey cudweed = Helichrysum luteoalbum Asteraceae = Compositae > The sunflower family.

Gnaphalium microcephalum

White everlasting, smallheaded cudweed, feltleaf everlasting Asteraceae = Compositae > The sunflower family.

Gnaphalium palustre

Swamp cudweed, western marsh cudweed, low cudweed Asteraceae = Compositae > The sunflower family.

Gnaphalium uliginosum

Swamp cudweed, marsh cudweed, low cudweed Asteraceae = Compositae > The sunflower family.

Gomphrena serrata

Prostrate gomphrena, prostrate globe-amaranth, coastal globe-amaranth Amaranthaceae > The amaranth family.

Goodyera oblongifolia

western rattlesnake-plantain, giant rattlesnake-plantain Orchidaceae > The orchid family.

Gossypium hirsutum

Cotton Malvaceae > The mallow family.

Gratiola neglecta

Clammy hedge-hyssop Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Grindelia integrifolia

Puget Sound gumweed Asteraceae = Compositae > The sunflower family.

Grindelia papposa

Spanish-gold = Prionopsis ciliata, Haplopappus ciliatus, Grindelia papposa Asteraceae = Compositae > The sunflower family.

Grindelia squarrosa

Curlycup gumweed Asteraceae = Compositae > The sunflower family.

Guizotia absynnica

Niger thistle (the "thistle seed" you get when buying birdseed) the only non-spiny "thistle" I know of... Asteraceae = Compositae > The sunflower family.

Gynandropsis gynandra

Shona cabbage, African cabbage, spiderwisp, cat's-whiskers Cleomaceae > The spider-flower family. Formerly in the Capparidaceae.

Gypsophila elegans

Showy baby's-breath Caryophyllaceae > The chickweed family.

Gypsophila paniculata

Baby's-breath Caryophyllaceae > The chickweed family.

Habenaria repens

Water-spider orchid Orchidaceae > The orchid family.

Hackelia deflexa

Nodding stickseed, American stickseed Boraginaceae > The borage family.

Halogeton glomeratus

saltlover, Aral barilla, halogeton Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae

Hedera helix

English ivy Araliaceae > The ginseng family.

Hedypnois cretica

Creteweed, cretanweed Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Asteraceae = Compositae > The sunflower family.

Helenium autumnale

Sneezeweed, common sneezeweed, large-flowered sneezeweed, fall sneezeweed Asteraceae = Compositae > The sunflower family.

Helianthella uniflora

One-flower helianthella, one-flowered sunflower Asteraceae = Compositae > The sunflower family.

Helianthemum corymbosum

Pine barren frostweed, clustered rock-rose Cistaceae > The rock-rose family.

Helianthus annuus

Common sunflower Asteraceae = Compositae > The sunflower family.

Helianthus debilis

Beach sunflower, cucumberleaf sunflower, weak sunflower, East Coast dune sunflower Asteraceae = Compositae > The sunflower family.

Helianthus maximiliani

Maximilian sunflower Asteraceae = Compositae > The sunflower family.

Helianthus tuberosus

Jerusalem artichoke, sunroot, sunchoke, earth apple, topinambour Asteraceae = Compositae > The sunflower family.

Heliopsis helianthoides

oxeye, oxeye sunflower, smooth oxeye, false sunflower Asteraceae = Compositae > The sunflower family.

Heliotropium amplexicaule

Clasping heliotrope, blue heliotrope, summer heliotrope Boraginaceae > The borage family.

Heliotropium curassavicum

Seaside heliotrope, salt heliotrope, monkey tail, quail plant Boraginaceae > The borage family.

Heliotropium procumbens

Fourspike heliotropium Boraginaceae > The borage family.

Hemerocallis fulva

Common day-lily, orange day-lily, tawny day-lily, Tiger day-lily, fulvous day-lily, ditch Lily, railroad day-lily, roadside day-lily, outhouse lily, washhouse lily Liliaceae > The lily family.

Heracleum mantegazzianum

Giant hogweed Apiaceae = Umbelliferae > The parsley family.

Heracleum maximum

Cow-parsnip Apiaceae = Umbelliferae > The parsley family.

Hesperis matronalis

Dame's-violet, damsel rocket, dame's rocket, damask violet, dames-wort, dame's gilliflower, night-scented gilliflower, queen's gilliflower, rogue's gilliflower, summer lilac, sweet rocket, mother-of-the-evening, winter gilliflower Brassicaceae = Cruciferae > The mustard family.

Heteranthera reniformis

Floating-leaf mud-plantain, kidney-leaf mud-plantain Pontederiaceae > The pickerelweed family.

Heterotheca subaxillaris

Telegraph-plant, camphorweed, false goldenaster Asteraceae = Compositae > The sunflower family.

Heterotheca villosa

Hairy false-goldenaster Asteraceae = Compositae > The sunflower family.

Heuchera cylindrica

poker heuchera, roundleaf alumroot Saxifragaceae > The saxifrage family.

Hibiscus cannabinus

Kenaf Malvaceae > The mallow family.

Hibiscus sp.

Hibiscus Malvaceae > The mallow family.

Hibiscus trionum

Venice mallow, flower-of-an-hour, bladder hibiscus, bladder ketmia, bladder weed, modesty, puarangi, shoofly Malvaceae > The mallow family.

Hieracium albertinum

Scouler's woollyweed, woolyweed, western hawkweed, hairy Albert, Albert's hawkweed = Hieracium scouleri Asteraceae = Compositae > The sunflower family.

Hieracium albiflorum

White hawkweed, white-flowered hawkweed Asteraceae = Compositae > The sunflower family.

Hieracium aurantiacum

Orange hawkweed Asteraceae = Compositae > The sunflower family.

Hieracium caespitosum

Meadow hawkweed, yellow hawkweed, field hawkweed = Hieracium pratense Asteraceae = Compositae > The sunflower family.

Hieracium canadense

Canadian hawkweed, Canada hawkweed, narrowleaf hawkweed, northern hawkweed = Hieracium umbellatum Asteraceae = Compositae > The sunflower family.

Hieracium glomeratum

Cluster hawkweed, yellowdevil hawkweed Asteraceae = Compositae > The sunflower family.

Hieracium pilosella

Mouse-ear hawkweed Asteraceae = Compositae > The sunflower family.

Hippuris vulgaris

Mare's-tail, common mare's-tail Plantaginaceae > The plantain family. Formerly in the Hippuridaceae.

Hirschfeldia incana

Shortpod mustard, Mediterranean mustard, buchanweed, hoary mustard Brassicaceae = Cruciferae > The mustard family.

Holcus lanatus

Velvetgrass, common velvetgrass, Yorkshire fog, tufted grass, meadow softgrass Poaceae = Gramineae > The grass family.

Holcus mollis

This species is not part of the Interactive Identification Guide.

Creeping velvetgrass, creeping softgrass, creeping fog Poaceae = Gramineae > The grass family.

photo of Holcus mollis — Holcus mollis: Most images are available for commercial use.

Holodiscus discolor

Oceanspray, ocean-spray, creambush Rosaceae > The rose family.

Holosteum umbellatum

Jagged chickweed Caryophyllaceae > The chickweed family.

Hordeum geniculatum

Knot barley = H. marinum ssp. gussonianum Poaceae = Gramineae > The grass family.

Hordeum jubatum

Foxtail barley, fox-tail barley Poaceae = Gramineae > The grass family.

Hordeum leporinum

Hare-barley Poaceae = Gramineae > The grass family.

Hordeum marinum

Seaside barley Poaceae = Gramineae > The grass family.

Hordeum murinum

Wall barley Poaceae = Gramineae > The grass family.

Hordeum vulgare

Barley, common barley, grain barley, barleycorn, barley flakes, barley grits, malt, naked barley, pearl barley, pot barley, Scotch barley, six-row barley, two-row barley Poaceae = Gramineae > The grass family.

Houstonia procumbens

Innocence, roundleaf bluet = Hedyotis procumbens Rubiaceae > The madder family.

Houttuynia cordata

Lizard tail, chameleon plant, chameleon, heartleaf, fishwort, bishop's-weed Saururaceae > The lizard’s-tail family.

Humulus lupulus

Hops, beer hops, hopfen, hoppen, wild hops Cannabaceae > The hemp family.

Hydrilla verticillata

Hydrilla, water-thyme, Florida elodea, Indian star-vine Hydrocharitaceae > The tape-grass family.

Hydrocharis morsus-ranae

European frogbit Hydrocharitaceae > The tape-grass family.

Hydrocotyle ranunculoides

Marsh pennywort, buttercup-pennywort, floating marsh-pennywort, floating marshpennywort, floating pennywort, hydrocotyl, hydrocotyle, pennywort, water penny wort, water pennywort Apiaceae = Umbelliferae > The parsley family.

Hydrocotyle umbellata

Manyflower marshpennywort, dollarweed, water pennywort, thick-leaved pennywort, Indian pennywort, Bevilacqua Apiaceae = Umbelliferae > The parsley family.

Hydrolea quadrivalvis

Waterpod Hydrophyllaceae > The waterleaf family.

Hydrophyllum capitatum

Ballhead waterleaf, cat's-breeches, dwarf waterleaf A native wildflower. Hydrophyllaceae > The waterleaf family.

Hydrophyllum fendleri

Fendler's waterleaf Hydrophyllaceae > The waterleaf family.

Hylotelephium telephium

Orpine, livelong, frog's-stomach, harping Johnny, life-everlasting, live-forever, midsummer-men, Orphan John, witch's moneybags = Sedum telephium Crassulaceae > The stonecrop family.

Hymenoclea salsola

White burrobrush, cheesebush, desert pearl, pearlbush = Ambrosia salsola var. fasciculata Asteraceae = Compositae > The sunflower family.

Hyoscyamus niger

Henbane, black henbane, stinking nightshade Solanaceae > The nightshade family.

Hyparrhenia rufa

Red thatching-grass, jaragua, jaragua grass, giant thatching grass Poaceae = Gramineae > The grass family.

Hypericum calycinum

Aaron's beard, large-flowered St. John's wort, creeping St. John's wort, goldflower, large flowered St John's wort, rose of Sharon Hypericaceae > The St. John’s-wort family.

Hypericum gentianoides

gentian-leaved St. John's-wort, orangegrass, pineweed Hypericaceae > The St. John’s-wort family.

Hypericum hypericoides

Reclining St. Andrew’s Cross, multi-stem St. Andrew's-cross Hypericaceae > The St. John’s-wort family.

Hypericum mutilum

Dwarf St. John's-wort Hypericaceae > The St. John’s-wort family.

Hypericum perforatum

St. Johnswort, Klamathweed, amber, goatweed, rosin rose, tiptonweed Hypericaceae > The St. John’s-wort family.

Hypericum scouleri

Scouler's St. John's-wort Hypericaceae > The St. John’s-wort family.

Hypochaeris radicata

Spotted cat's-ear, cat's-ear, cat's-ear dandelion, common catsear, false dandelion, flatweed, hairy cat's ear, hairy wild lettuce, rough cat's ear, spotted cat's ear Asteraceae = Compositae > The sunflower family.

Hyptis mutabilis

Tropical bush-mint Lamiaceae = Labiatae > The mint family.

Hyssopus officinalis

Hyssop Lamiaceae = Labiatae > The mint family.

Iberis sempervirens

Evergreen candytuft, perennial candytuft Brassicaceae = Cruciferae > The mustard family.

Ilex aquifolium

English holly, dune holly, hummock holly, scrub holly Aquifoliaceae > The holly family.

Ilex glabra

Appalachian tea, dye-leaves, evergreen winter-berry, gallberry, inkberry Aquifoliaceae > The holly family.

Iliamna rivularis

Streambank wild-hollyhock Malvaceae > The mallow family.

Impatiens aurella

Pale-yellow touch-me-not Balsaminaceae > The touch-me-not family.

Impatiens balfourii

Balfour's touch-me-not, Kashmir balsam, poor man's orchid Balsaminaceae > The touch-me-not family.

Impatiens capensis

Orange jewelweed, common jewelweed, spotted jewelweed, spotted touch-me-not, orange balsam Balsaminaceae > The touch-me-not family.

Impatiens glandulifera

Ornamental jewelweed, policeman's helmet, purple jewelweed, Himalayan balsam Balsaminaceae > The touch-me-not family.

Indigofera hirsuta

Hairy indigo, rough-hairy indigo Fabaceae = Leguminosae > The pea family.

Indigofera spicata

Creeping indigo, trailing indigo Fabaceae = Leguminosae > The pea family.

Inula helenium

Elecampane, Inula, inul, horseheal, elf-dock, elfwort, horse-elder, scabwort, yellow starwort, velvet dock, wild sunflower. Asteraceae = Compositae > The sunflower family.

Ipomoea cairica

Cairo morning glory, coast morning glory, railroad creeper, mile-a-minute vine, Messina creeper, Convolvulaceae > The morningglory family.

Ipomoea cordatotriloba

Tievine, cotton morningglory Convolvulaceae > The morningglory family.

Ipomoea hederacea

Ivy-leaf morningglory, entire-leaved morningglory Convolvulaceae > The morningglory family.

Ipomoea hederifolia

Scarlet creeper, star ipomoea; Convolvulaceae > The morningglory family.

Ipomoea indica

Blue morningglory, oceanblue morningglory, koali awa, blue dawn-flower Convolvulaceae > The morningglory family.

Ipomoea lacunosa

Whitestar, pitted morningglory Convolvulaceae > The morningglory family.

Ipomoea leptophylla

Bush morningglory, bush moonflower, man-root Convolvulaceae > The morningglory family.

Ipomoea nil

Picotee morningglory, ivy morningglory, Japanese morning glory Convolvulaceae > The morningglory family.

Ipomoea pandurata

Man-of-the-earth, wild potato-vine, manroot, wild sweet-potato, and wild rhubarb Convolvulaceae > The morningglory family.

Ipomoea pes-caprae

Beach morningglory, bayhops, goat's foot Convolvulaceae > The morningglory family.

Ipomoea purpurea

Purple morningglory, tall morningglory, common morningglory Convolvulaceae > The morningglory family.

Ipomoea quamoclit

Cypressvine morning glory, cardinal creeper, cardinal vine, star glory, hummingbird vine Convolvulaceae > The morningglory family.

Ipomoea tricolor

Heavenly blue morningglory, morningglory, pearly-gates morningglory Convolvulaceae > The morningglory family.

Ipomoea triloba

Aiea morningglory, littlebell, pink convolvulus, pitted morningglory, potato vine, three-lobe morningglory Convolvulaceae > The morningglory family.

Ipomoea wrightii

palmleaf morningglory, Wright's morningglory Convolvulaceae > The morningglory family.

Ipomoea x sloteri

Cardinal climber (a horticultural hybrid) Convolvulaceae > The morningglory family.

Ipomopsis aggregata

Scarlet gilia, scarlet skyrocket, scarlet trumpet, skunk-flower = Gilia aggregata Polemoniaceae > The phlox family.

Iris missouriensis

Wild iris, western blue flag, Rocky Mountain iris, Missouri flag Iridaceae > The iris family.

Iris pseudacorus

yellow flag, yellow iris, water flag Iridaceae > The iris family.

Irisine diffusa

Juba's-bush Amaranthaceae > The amaranth family.

Isatis tinctoria

Dyer's-woad, woad, glastum Brassicaceae = Cruciferae > The mustard family.

Iva annua

Annual marsh-elder, marsh-elder, sumpweed Asteraceae = Compositae > The sunflower family.

Iva axillaris

Poverty sumpweed, deathweed, povertyweed, Asteraceae = Compositae > The sunflower family.

Ixora coccinea

Jungle geranium, flame-of-the-woods, jungleflame, scarlet jungleflame Rubiaceae > The madder family.

Jacobaea vulgaris

Tansy ragwort = Senecio jacobaea Asteraceae = Compositae > The sunflower family.

Juglans nigra

Black walnut, eastern black walnut Juglandaceae > The walnut family.

Juncus bufonius

Bullfrog rush, toad rush Juncaceae > The rush family.

Juncus effusus

Soft rush, common rush Juncaceae > The rush family.

Juncus ensifolius

Dwarf rush, daggerleaf rush, swordleaf rush, three-stamened rush Juncaceae > The rush family.

Juncus validus

Roundhead rush Juncaceae > The rush family.

Juniperus scopulorum

Rocky Mountain juniper Cupressaceae > The cedar family.

Juniperus virginiana

Eastern red-cedar, eastern redcedar, red cedar, eastern juniper, red juniper, pencil cedar, aromatic cedar Cupressaceae > The cedar family.

Justicia betonica

Squirrel's tail, squirrel-tail, white shrimp-plant, paper-plume Acanthaceae > The acanthus family.

Kalanchoe tubiflora

Maternity-plant Crassulaceae > The stonecrop family.

Kerria japonica

Japanese rose, kerria, bachelor's buttons, double-flowered Japanese rose, Jew's mallow Rosaceae > The rose family.

Kickxia elatine

Sharpleaf cancerwort, sharppoint fluvellin, sharp-leaved fluvellin (fluvellin sometimes spelled fluellen) Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Kickxia spuria

roundleaf cancerwort, round-leaved fluvellin (fluvellin sometimes spelled fluellen) Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Knautia macedonica

Macedonian knautia This is a horticultural species but is superficially similar to Knautia arvensis (field scabious) which is a weedy species. Dipsacaceae > The teasel family.

Koelreuteria paniculata

Goldenrain tree, golden rain-tree, pride of India, China tree, varnish tree Sapindaceae > The soapberry family.

Kyllinga brevifolia

Shortleaf spikesedge, green kyllinga, greenhead sedge, perennial greenhead sedge Cyperaceae > The sedge family.

Kyllinga squamulata

Asian spikesedge Cyperaceae > The sedge family.

Laburnum anagyroides

Common laburnum, golden chain, golden rain Fabaceae = Leguminosae > The pea family.

Lachnocaulon anceps

Bog-buttons, whitehead bogbutton Eriocaulaceae > The pipewort family.

Lactuca biennis

Tall blue lettuce, wild blue lettuce Despite the common names, this species can have yellow flowers. Check the number of nerves on the seeds to distinguish it from certain other species. Asteraceae = Compositae > The sunflower family.

Lactuca canadensis

Canada lettuce, Canada wild-lettuce, tall lettuce, Florida blue lettuce Asteraceae = Compositae > The sunflower family.

Lactuca mutant

Asteraceae = Compositae > The sunflower family.

Lactuca sativa

Cultivated lettuce (like you buy at the store :)), only this is more mature. Asteraceae = Compositae > The sunflower family.

Lactuca serriola

Prickly lettuce, China lettuce, Chinese lettuce, compass plant, horse thistle, milk thistle, whip thistle, wild lettuce, wild opium Asteraceae = Compositae > The sunflower family.

Lactuca x serriola hybrid

My guess is that this is a hybrid between Lactuca serriola and Lactuca saligna, but if you look at the images labeled Lactuca mutant, they may just be extreme examples of phenotypic plasticity within Lactuca serriola. Asteraceae = Compositae > The sunflower family.

Lagenaria siceraria

Cucurbitaceae > The cucumber family. Bottle gourd, calabash, opo squash, long melon

Lagophylla ramosissima

branched hareleaf, branched lagophylla Asteraceae = Compositae > The sunflower family.

Lagurus ovatus

Hare's-tail grass, bunny tails, bunnies' tails, Turk's-head grass, rabbit's-tail grass Poaceae = Gramineae > The grass family.

Lamarkia aurea

Golden-top grass, goldentop grass = Cynosurus aureus Poaceae = Gramineae > The grass family.

Lamium album

White dead-nettle, white nettle, snowflake Lamiaceae = Labiatae > The mint family.

Lamium amplexicaule

Henbit, dead-nettle, greater henbit Lamiaceae = Labiatae > The mint family.

Lamium galeobdolon

Yellow archangel = Galeobdolon luteum Lamiaceae = Labiatae > The mint family.

Lamium maculatum

Spotted deadnettle, devil's clover, devil's nettle, double-tongue, St Vincent's nettle, variegated deadnettle Lamiaceae = Labiatae > The mint family.

Lamium purpureum

Red deadnettle, purple deadnettle, purple archangel Lamiaceae = Labiatae > The mint family.

Lamprocapnos spectabilis

Bleedingheart, bleeding-heart, Asian bleeding-heart Fumariaceae > The fumitory family.

Lantana camara

Lantana, big-sage, wild-sage, red-sage, white-sage, tickberry Verbenaceae > The verbena family.

Lappula redowskii

Flatspine stickseed, desert stickseed, western stickseed, flat-spine sheepburr = Lappula occidentalis Boraginaceae > The borage family.

Lappula squarrosa

European stickseed, bluebur, bristly sheepbur Boraginaceae > The borage family.

Lapsana communis

Nipplewort, common nipplewort, succory dock-cress Asteraceae = Compositae > The sunflower family.

Larrea tridentata

Creosote-bush, creosotebush, greasewood (also applied to Sarcobatus), chaparral (also applied to Arctostaphyllos) = Larrea divaricata Zygophyllaceae > The creosote-bush family.

Lathyrus japonicus

Beach pea, smallflower beachpea, circumpolar pea sea vetchling, sea pea Fabaceae = Leguminosae > The pea family.

Lathyrus latifolius

Broad-leaved everlasting sweetpea, everlasting pea, everlasting sweetpea, perennial sweetpea, perennial pea-vine, sweet pea, wild sweetpea Fabaceae = Leguminosae > The pea family.

Lathyrus odoratus

Sweetpea, sweet-pea, ornamental sweetpea, annual sweetpea Fabaceae = Leguminosae > The pea family.

Lathyrus sylvestris

Narrow-leaf everlasting-pea, narrow-leaf everlasting-sweetpea,flat-pea, flatpea, flat peavine, perennial sweetpea Fabaceae = Leguminosae > The pea family.

Lemna minor

Common duckweed, duck-meat, watermeal, ducks-meal Lemnaceae > The duckweed family.

Lemna obscura

Least duckweed, purple duckweed Lemnaceae > The duckweed family.

Leonotis nepetifolia

Lion's-ear, annual lion's-ear, Christmas candlestick Lamiaceae = Labiatae > The mint family.

Leontodon hispidus

Bristly hawkbit, rough hawkbit Asteraceae = Compositae > The sunflower family.

Leontodon saxatilis

Autumnal hawkbit, hairy hawkbit, hawkbit, lesser hawkbit, little hawk's-bit, rough hawkbit, rough hawk's-bit, smooth hawkbit Asteraceae = Compositae > The sunflower family.

Leonurus cardiaca

Motherwort, lion's-tail, lion's-ear Lamiaceae = Labiatae > The mint family.

Lepidium campestre

Field pepperweed, field peppergrass, cow-cress Brassicaceae = Cruciferae > The mustard family.

Lepidium densiflorum

Dense-flowered pepperweed, miner's pepperwort, miners' pepperweed, prairie pepperweed, greenflower pepperweed, peppergrass, common pepperweed Brassicaceae = Cruciferae > The mustard family.

Lepidium lasiocarpum

Hairy-pod pepperwort, shaggyfruit pepperweed' hairypod pepperweed Brassicaceae = Cruciferae > The mustard family.

Lepidium latifolium

Perennial pepperweed, tall whitetop, broadleaved pepperweed, pepperwort, peppergrass, dittander, dittany, beige lace Brassicaceae = Cruciferae > The mustard family.

Lepidium nitidum

Shining pepperweed, peppergrass, shining pepper-peppergrass, tongue-grass Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Brassicaceae = Cruciferae > The mustard family.

Lepidium perfoliatum

Perfoliate pepperweed, clasping pepperweed Brassicaceae = Cruciferae > The mustard family.

Lepidium ramosissimum

Many-branched pepperweed Brassicaceae = Cruciferae > The mustard family.

Lepidium sativum

Lepidium virginicum

Virginia pepperweed, least pepperwort, peppergrass Brassicaceae = Cruciferae > The mustard family.

Leptochloa fascicularis

Bearded sprangletop, salt-meadow grass = Diplache fusca ssp. fascicularis Poaceae = Gramineae > The grass family.

Lepyrodiclis holosteoides

Lepyrodiclis, pashenik, false jagged-chickweed, Beckerweed (known to occur in Washington and Idaho only) Caryophyllaceae > The chickweed family.

Lespedeza cuneata

Chinese bushclover, sericea lespedeza, sericea Fabaceae = Leguminosae > The pea family.

Leucaena leucocephala

White leadtree, jumbay, river tamarind, Subabul, white popinac Fabaceae = Leguminosae > The pea family.

Leucanthemum maximum

Shasta daisy = Chrysanthemum maximum Asteraceae = Compositae > The sunflower family.

Leucanthemum vulgare

Oxeye daisy, marguerite, marguerite daisy Asteraceae = Compositae > The sunflower family.

Levisticum officinale

Apiaceae = Umbelliferae >the parsley family. Lovage, garden lovage, old English lovage, Italian lovage, Cornish lovage, love-parsley, mountain celery, Maggie-plant, bladder seed, sea parsley

Lewisia rediviva

Portulacaceae > The purslane family.

Liatris aspera

Rough gayfeather Asteraceae = Compositae > The sunflower family.

Ligustrum vulgare

Common privet, European privet Oleaceae > The olive family.

Limnanthes douglasii

Poached-egg-plant, Douglas' meadowfoam, Ornduff's meadowfoam Limnanthaceae > The meadowfoam family.

Limnobium spongia

Smooth frogbit, West Indian spongeplant, South American spongeplant, Amazon frogbit. Hydrocharitaceae > The tape-grass family.

Limonium latifolium

Sea-lavender Plumbaginaceae > The leadwort family.

Limonium sinuatum

Statice, notch-leaf sea lavender, perennial-sea-lavender, sea lavender, sea-pink, statice, wavyleaf sea-lavender Plumbaginaceae > The leadwort family.

Linaria dalmatica

Dalmatian toadflax, Balkan toadflax, broadleaf toadflax Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Linaria floridana

Apalachicola toadflax, Florida toadflax Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Linaria purpurea

Purple toadflax Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Linaria vulgaris

Yellow toadflax,common toadflax, butter-and-eggs Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Lindernia dubia

Yellowseed false-pimpernel Linderniaceae > The Lindernia family.

Linum bienne

Pale flax = Linum angustifolium Linaceae > The flax family.

Linum floridanum

Florida yellow flax Linaceae > The flax family.

Linum lewisii

Lewis flax, prairie flax, western blue flax Linaceae > The flax family.

Linum perenne

Perennial flax, blue flax, European blue flax, alpine flax Linaceae > The flax family.

Lithophragma parviflora

Small-flowered, woodlandstar, small-flowered prairie-star, ragged-robin A native wildflower. Saxifragaceae > The saxifrage family.

Lithospermum purpurocaeruleum

Purple gromwell = Buglossoides purpurocaeruleum Boraginaceae > The borage family.

Lithospermum ruderale

Western gromwell, wayside gromwell, western stoneseed, desert cat's-tooth, Columbia pucoon Boraginaceae > The borage family.

Livia juncorum

Tassel gall Galls shown on Juncus sp.

Lobelia feayana

Bay lobelia Campanulaceae > The bellflower family.

Lobelia pedunculata

Blue star-creeper, matted pratia, trailing pratia = Pratia pedunculata Campanulaceae > The bellflower family.

Lolium multiflorum

Annual ryegrass, Italian ryegrass = Lolium perenne ssp. multiflorum Poaceae = Gramineae > The grass family.

Lolium perenne

Perennial ryegrass = Lolium perenne ssp. perenne Poaceae = Gramineae > The grass family.

Lomatium dissectum

Fernleaf lomatium, giant biscuitroot, fernleaf biscuitroot, giant lomatium, giant desertparsley, chocolate-tips, cough root Apiaceae = Umbelliferae > The parsley family.

Lomatium farinosum

Coeur d'Alene desert-parsley, northern biscuitroot, flower-root Apiaceae = Umbelliferae > The parsley family.

Lomatium gormanii

Salt-and-pepper, Gorman's lomatium, biscuitroot, spring desert-parsley My favorite native wildflower, I can often find it in flower in SE Washington in early December. Thus the first wildflower of spring is in flower prior to the first official day of winter! Apiaceae = Umbelliferae > The parsley family.

Lomatium grayi

Gray's lomatium This native species can be somewhat weedy and is common in disturbed sites. Apiaceae = Umbelliferae > The parsley family.

Lomatium macrocarpum

Large-fruited lomatium The flowers of this species are pollinated by flies and carrion ants, and smell like rotting fish! Apiaceae = Umbelliferae > The parsley family.

Lomatium salmoniflorum

Salmon River lomatium Apiaceae = Umbelliferae > The parsley family.

Lomatium triternatum

Nine-leaved lomatium Apiaceae = Umbelliferae > The parsley family.

Lonicera ciliosa

Orange honeysuckle Caprifoliaceae > The honeysuckle family.

Lonicera involucrata

Black twinberry, twinberry, bearberry honeysuckle, bush honeysuckle, bracted honeysuckle Caprifoliaceae > The honeysuckle family.

Lonicera japonica

Japanese honeysuckle Caprifoliaceae > The honeysuckle family.

Lonicera maackii

Amur honeysuckle, overgrowing choke-plant Caprifoliaceae > The honeysuckle family.

Lonicera periclymenum

European honeysuckle, European woodbine, common honeysuckle, Caprifoliaceae > The honeysuckle family.

Lonicera sempervirens

Coral honeysuckle, trumpet honeysuckle, woodbine Caprifoliaceae > The honeysuckle family.

Lonicera tatarica

Tatarian honeysuckle Caprifoliaceae > The honeysuckle family.

Lotus corniculatus

Bird's-foot-trefoil, common bird's-foot-trefoil, Granny's toenails, butter-and-eggs, eggs-and-bacon, hen-and-chickens Fabaceae = Leguminosae > The pea family.

Ludwigia grandiflora

Large-flowered primrose-willow, perennial water primrose, Uruguayan primrose willow Onagraceae > The evening-primrose family.

Ludwigia octovalvis

Mexican primrose-willow Onagraceae > The evening-primrose family.

Lunaria annua

Silver-dollar plant, money-plant, honesty, Bolbonac, moonwort Brassicaceae = Cruciferae > The mustard family.

Lupinus arizonicus

Arizona lupine Fabaceae = Leguminosae > The pea family.

Lupinus leucophyllus

Velvet lupine Fabaceae = Leguminosae > The pea family.

Lupinus littoralis

Seashore lupine Fabaceae = Leguminosae > The pea family.

Lupinus plattensis

Nebraska lupine Fabaceae = Leguminosae > The pea family.

Lupinus rivularis

Riverside lupine, streambank lupine, stream lupine, nine finger Fabaceae = Leguminosae > The pea family.

Lychnis armeria

Garden catchfly Caryophyllaceae > The chickweed family.

Lychnis coronaria

Rose campion, dusty miller, mullein-pink, bloody William Caryophyllaceae > The chickweed family.

Lycium barbarum

Matrimony-vine, wolfberry, goji-berry Solanaceae > The nightshade family.

Lycium carolinianum

Christmasberry, Carolina wolfberry, Carolina desert-thorn, creeping wolfberry Solanaceae > The nightshade family.

Lycopus americanus

American water-horehound, American bugleweed, cut-leaf water-horehound Lamiaceae = Labiatae > The mint family.

Lycopus asper

Rough bugleweed, rough water-horehound Lamiaceae = Labiatae > The mint family.

Lygodesmia aphylla

Rose-rush, roserush Asteraceae = Compositae > The sunflower family.

Lygodium japonicum

Japanese climbing fern Lygodiaceae > The climbing fern family.

Lysichiton americanus

Skunk-cabbage, western skunk-cabbage, yellow skunk-cabbage The genus is often spelled Lysichitum Araceae > The arum family.

Lysimachia ciliata

Fringed loosestrife Myrsinaceae > The Myrsine family. Formerly in the Primulaceae.

Lysimachia clethroides

Gooseneck loosestrife Myrsinaceae > The Myrsine family. Formerly in the Primulaceae.

Lysimachia minima

Chaffweed = Anagallis minima, Centunculus minimus Myrsinaceae > The Myrsine family. Formerly in the Primulaceae.

Lysimachia nummularia

Creeping jenny, moneywort, , twopenny thot, herb twopence Myrsinaceae > The Myrsine family. Formerly in the Primulaceae.

Lysimachia punctata

Large yellow-loosestrife Myrsinaceae > The Myrsine family. Formerly in the Primulaceae.

Lysimachia vulgaris

Yellow loosestrife, garden loosestrife, garden yellow loosestrife Myrsinaceae > The Myrsine family. Formerly in the Primulaceae.

Lythrum hyssopifolium

Hyssop loosestrife, grass poly Lythraceae > The loosestrife family.

Lythrum salicaria

Purple loosestrife, blooming sally, purple willow-herb, rainbow weed, spiked lythrum, purple spiked loosestrife, bouquet violet, purple spiked willowstrife Lythraceae > The loosestrife family.

Macfadyena unguis-cati

Cat-claw vine, cat's-claw creeper Bignoniaceae > The trumpet-creeper family.

Machaeranthera canescens

Hoary tansyaster, hoary-aster = Dietertia canescens Asteraceae = Compositae > The sunflower family.

Machaeranthera pinnatifida

Lacy tansy-aster, spiny goldenweed = Xanthisma spinulosum Asteraceae = Compositae > The sunflower family.

Maclura pomifera

Osage orange, hedge apple, horse apple, bodock, monkey ball, bois d'arc, bodark Moraceae > The mulberry family.

Madia exigua

Small tarweed, threadstem madia, meager tarweed, little tarweed, threadstem tarweed Asteraceae = Compositae > The sunflower family.

Madia glomerata

Cluster tarweed, mountain tarweed Asteraceae = Compositae > The sunflower family.

Madia gracilis

Grassy tarweed, slender tarweed, gumweed madia Asteraceae = Compositae > The sunflower family.

Madia sativa

Chilean tarplant Asteraceae = Compositae > The sunflower family.

Maianthemum dilatatum

False lily-of-the-valley, false lily of the valley, two-leaved false Soloman's-seal, snakeberry Liliaceae > The lily family. Some place this genus in the Ruscaceae or Asparagaceae

Malacothrix glabrata

smooth desert-dandelion, desert dandelion Asteraceae = Compositae > The sunflower family.

Malacothrix saxatalis

Cliff desert-dandelion, cliff aster Asteraceae = Compositae > The sunflower family.

Malcolmia africana

Malcolm stock, African stock Brassicaceae = Cruciferae > The mustard family.

Malus domestica

Apple Rosaceae > The rose family.

Malva alcea

Hollyhock, vervain mallow,European mallow, hollyhock mallow Malvaceae > The mallow family.

Malva moschata

Musk mallow Malvaceae > The mallow family.

Malva neglecta

Common mallow, buttonweed, cheeseplant, cheeseweed, dwarf mallow, roundleaf mallow Malvaceae > The mallow family.

Malva parviflora

Small-flowered marshmallow, cheeseweed, cheeseweed mallow, Egyptian mallow, least mallow, little mallow, mallow, marshmallow, small-flowered mallow Malvaceae > The mallow family.

Malva sylvestris

Tall mallow, high mallow, blue mallow, cheese-cake, pick-cheese, round dock, country-mallow, wild mallow, wood mallow Malvaceae > The mallow family.

Malvaviscus penduliflorus

Turk's cap, sleeping hibiscus, cardinal's hat Malvaceae > The mallow family.

Marah macrocarpus

Cucamonga manroot, Cucamonga bigroot Cucurbitaceae > The cucumber family.

Marah oreganus

Oregon manroot, coastal manroot, western wild-cucumber Cucurbitaceae > The cucumber family.

Marchantia sp.

Common liverwort. One of the few non-vascular plants included here, due to frequent questions on identification.

Marrubium vulgare

White horehound, common horehound, wild horehound, woolly horehound, hoarhound Lamiaceae = Labiatae > The mint family.

Marsilea vestita

Hairy water-clover Marsileaceae > The water-clover family.

Matelea floridana

Florida milkvine, Florida spinypod Apocynaceae > The dogbane family. Formerly in the Asclepiadaceae.

Matricaria discoidea

Pineappleweed, wild chamomile, disc mayweed = Matricaria matricarioides Asteraceae = Compositae > The sunflower family.

Matricaria recutita

Chamomile, camomilla, wild chamomile, scented mayweed Asteraceae = Compositae > The sunflower family.

Medicago arabica

Spotted medick, spotted burclover, heart clover Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Fabaceae = Leguminosae > The pea family.

Medicago lupulina

Black medic, nonesuch, hop clover (the latter also used for some Trifolium species) Fabaceae = Leguminosae > The pea family.

Medicago polymorpha

Bur-clover, burclover, burr-medic, California bur-clover, common burr-medic, hairy medic, spiny bur-medic, toothed bur-clover, toothed medic, yellow bur-clover Fabaceae = Leguminosae > The pea family.

Medicago sativa

Alfalfa, lucerne Fabaceae = Leguminosae > The pea family.

Megathyrsus maximus

Guineagrass = Panicum maximum Poaceae = Gramineae > The grass family.

Melanthera nivea

Snow squarestem Asteraceae = Compositae > The sunflower family.

Melilotus alba

White sweetclover. Considered by some to be a form of Melilotus officinalis (yellow sweetclover). Fabaceae = Leguminosae > The pea family.

Melilotus indicus

Annual yellow sweetclover Fabaceae = Leguminosae > The pea family.

Melilotus officinalis

Yellow sweetclover Fabaceae = Leguminosae > The pea family.

Melinus repens

Rose Natal grass, red Natal grass, Natal grass, Natal redtop Poaceae = Gramineae > The grass family.

Melissa officinalis

Lemon balm, lemon mint, balm, common balm, balm mint Lamiaceae = Labiatae > The mint family.

Melothria pendula

Creeping cucumber, Guadeloupe cucumber, squirting cucumber Cucurbitaceae > The cucumber family.

Mentha aquatica

Water mint Lamiaceae = Labiatae > The mint family.

Mentha arvensis

Corn mint, field mint, wild mint Lamiaceae = Labiatae > The mint family.

Mentha piperita

Peppermint Lamiaceae = Labiatae > The mint family.

Mentha pulegium

Pennyroyal, squaw mint, mosquito plant, pudding grass Lamiaceae = Labiatae > The mint family.

Mentha spicata

Spearmint Lamiaceae = Labiatae > The mint family.

Mentha suaveolens

Apple mint, hierbabuena Lamiaceae = Labiatae > The mint family.

Mentzelia albicaulis

White-stem stickleaf, whitestem blazing star, small flowered blazing star, white stemmed stickleaf Loasaceae > The blazingstar family.

Mentzelia floridana

Poorman's patch, stickleaf Loasaceae > The blazingstar family.

Mentzelia laevicaulis

Giant blazingstar, smoothstem blazingstar Loasaceae > The blazingstar family.

Mentzelia nuda

Bractless blazingstar, bractless stickleaf, goodmother Loasaceae > The blazingstar family.

Mentzelia oligosperma

Few-seeded mentzelia, stickleaf, chicken-thief Loasaceae > The blazingstar family.

Mentzelia tricuspis

Spinyhair blazingstar Loasaceae > The blazingstar family.

Merremia aegyptia

Hairy woodrose, hairy merremia, hairy morning glory, hairy morning-glory, Convolvulaceae > The morningglory family.

Merremia dissecta

Alamo vine, cut-leaf morning glory, mile-a-minute, noon flower, Noyau vine, snakevine Convolvulaceae > The morningglory family.

Mertensia longiflora

Long-flowered bluebells, small bluebells, trumpet bluebells A native wildflower. Boraginaceae > The borage family.

Mespilus germanica

Medlar, common medlar Rosaceae > The rose family.

Microstegium vimineum

Japanese stiltgrass, Nepalese browntop, Chinese packing grass, Asian stilt grass, annual jewgrass, bamboograss, Nepal microstegium, eulalia, Mary's grass Poaceae = Gramineae > The grass family.

Microsteris gracilis

Annual phlox Polemoniaceae > The phlox family.

Microthlaspi perfoliatum

Perfoliate penny-cress, claspleaf penny-cress Brassicaceae = Cruciferae > The mustard family.

Mikania scandens

Climbing hempvine, climbing hempweed, louse-plaster Asteraceae = Compositae > The sunflower family.

Mimosa nuttalii

Nuttall's sensitive-briar, catclaw brier, sensitive brier, porcupine momosa = Mimosa hystricina Fabaceae = Leguminosae > The pea family.

Mimosa pudica

Sensitive plant, touch-me-not plant, humble plant, shameful plant Fabaceae = Leguminosae > The pea family.

Mimosa quadrivalvis

Little-leaf sensitive briar, little-leaf mimosa, catclaw sensitive briar, smooth-leaf sensitive briar, pink sensitive briar, shame vine Fabaceae = Leguminosae > The pea family.

Mimulus guttatus

Yellow monkeyflower, golden monkeyflower, seep monkeyflower, common monkeyflower Phrymaceae > The lopseed family. Formerly in the Scrophulariaceae.

Mimulus ringens

Allegheny monkeyflower, square-stemmed monkeyflower Phrymaceae > The lopseed family. Formerly in the Scrophulariaceae.

Mirabilis jalapa

Four-o’clock, marvel of Peru Nyctaginaceae > The four-o’clock family.

Mirabilis nyctaginea

Wild four o'clock, heartleaf four o'clock, heartleaf umbrellawort Nyctaginaceae > The four-o’clock family.

Miscanthus sinensis

Chinese silver grass, Eulalia grass, maiden grass, zebra grass, Susuki grass, porcupine grass Poaceae = Gramineae > The grass family.

Misopates orontium

Weasel's snout, linearleaf snapdragon, lesser snapdragon, calf's snout Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Mitreola petiolata

Lax hornpod Loganiaceae > The logania family.

Modiola caroliniana

Carolina bristlemallow, babosilla, redflower mallow Malvaceae > The mallow family.

Mollugo verticillata

Green carpetweed, Indian chickweed Molluginaceae > The carpetweed family.

Moluccella laevis

bells of Ireland, Irish bellflower, Irish bells, Irish greenbells, needles and thread, old maid's nightcap, shell flower, smooth molucca balm Lamiaceae = Labiatae > The mint family.

Momordica charantia

Bitter melon, bitter gourd, bitter squash, balsam-pear Cucurbitaceae > The cucumber family.

Monolepis nuttaliana

Nuttall's povertyweed, povertyweed Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Montia linearis

narrowleaf miner's-lettuce, narrow-leafed montia Montiaceae > The montia family. Formerly in the Portulacaceae.

Morrenia odorata

Strangler vine, latex vine, milkweed vine Apocynaceae > The dogbane family. Formerly in the Asclepiadaceae.

Morus alba

White mulberry Moraceae > The mulberry family.

Muehlenbeckia axillaris

Creeping pohuehue, creeping muehlenbeckia, pohuehue, creeping wire vine, sprawling wire vine, matted lignum Polygonaceae > The rhubarb family.

Muehlenbeckia complexa

Maidenhair vine, creeping wire vine, lacy wire vine, angel vine, mattress vine, mattress wireweed, necklace vine, wire vine Polygonaceae > The rhubarb family.

Muhlenbergia asperifolia

Alkali muhly, scratchgrass Poaceae = Gramineae > The grass family.

Muhlenbergia schreberi

Nimblewill, wiregrass nimblewill Poaceae = Gramineae > The grass family.

Muscari botryoides

common grape-hyacinth Hyacinthaceae > The hyacinth family. Formerly in the Liliaceae.

Mycelis muralis

Wall-lettuce Asteraceae = Compositae > The sunflower family.

Myosotis discolor

Changing forget-me-not Boraginaceae > The borage family.

Myosotis stricta

Strict forget-me-not, blue scorpion grass Boraginaceae > The borage family.

Myosotis sylvatica

Wood forget-me-not, garden forget-me-not Boraginaceae > The borage family.

Myosoton aquaticum

Giant chickweed, water chickweed Caryophyllaceae > The chickweed family.

Myriophyllum aquaticum

Parrot feather, Brazilian water-milfoil Haloragaceae > The water-milfoil family.

Myriophyllum sibiricum

Haloragaceae > The water-milfoil family. Shortspike watermilfoil, northern watermilfoil, Siberian water-milfoil

Myriophyllum spicatum

Eurasian water-milfoil Haloragaceae > The water-milfoil family.

Myrrhis odorata

Sweet-cicely Apiaceae = Umbelliferae > The parsley family.

Narcissus poeticus

Poet's daffodil, poet's narcissus, nargis, pheasant's eye, findern flower, pinkster lily Amaryllidaceae > the amaryllis family. Formerly in the Liliaceae.

Nardus stricta

Poaceae = Gramineae > The grass family. Matgrass, doormat-grass, Moor matgrass, nard grass

Navarretia intertexta

Needleleaf pincushion-plant Polemoniaceae > The phlox family.

Navarretia squarrosa

Shunkweed, stinkweed, California stinkweed Polemoniaceae > The phlox family.

Nemophila breviflora

Basin nemophila, Great Basin nemophila, Great Basin baby-blue-eyes Boraginaceae > The borage family. Formerly in the Hydrophyllaceae.

Nepeta cataria

Catnip, catswort, catmint Lamiaceae = Labiatae > The mint family.

Nerium oleander

Oleander Apocynaceae > The dogbane family.

Nestotus stenophyllus

Narrowleaf mock-goldenweed A native wildflower of arid sites in the western US. = Haplopappus stenophyllus, Stenotus stenophyllus Asteraceae = Compositae > The sunflower family.

Nicandra physalodes

Apple of Peru, apple-of-Peru, Chinese lantern, Peru apple, shoo fly, shoofly, shoo-fly plant, shoofly plant, shoofly-plant, shooflyplant, wild gooseberry, wild hops Solanaceae > The nightshade family.

Nicotiana attenuata

Coyote tobacco Solanaceae > The nightshade family.

Nicotiana glauca

Tree tobacco Solanaceae > The nightshade family.

Nicotiana obtusifolia

Solanaceae > The nightshade family.

Nicotiana rustica

Wild tobacco, shamanic tobacco, erowid tobacco, Aztec tobacco Solanaceae > The nightshade family.

Nigella damascena

Love-in-a-mist, ragged lady, devil-in-the-bush Ranunculaceae > The buttercup family.

Nuphar polysepalum

Yellow water lily, cow lily, wokas, brandy bottle, pond collard, spatterdock, frog lily and showy yellow pond lily Nymphaceae > The water-lily family.

Nuttalanthus canadensis

Oldfield toadflax, blue toadflax Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Nymphaea odorata

American white-water-lily, fragrant water-lily, white water-lily Nymphaceae > The water-lily family.

Oenanthe sarmentosa

Pacific water-parsley, water-parsley Apiaceae = Umbelliferae > The parsley family.

Oenothera contorta

Contorted-pod evening-primrose, contorted evening-primrose, contorted primrose, bentpod desert primrose, twisted suncup, Douglas’ evening primrose, contorted suncup, dwarf contorted suncup = Gaura coccinea Onagraceae > The evening-primrose family.

Oenothera curtiflora

Small-flowered gaura, velvetweed = Gaura parviflora, Gaura mollis Onagraceae > The evening-primrose family.

Oenothera glazioviana

Large-flowered evening-primrose, redsepal evening-primrose Onagraceae > The evening-primrose family.

Oenothera pallida

Pale evening-primrose, white buttercup, white evening-primrose Onagraceae > The evening-primrose family.

Oenothera simulans

Southern beeblossom = Gaura angustifolia Onagraceae > The evening-primrose family.

Oenothera sinuosa

Wavyleaf beeblossom, Red River gaura Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. = Gaura sinuata Onagraceae > The evening-primrose family.

Oenothera strigosa

Hairy evening-primrose = Oenothera villosa ssp. strigosa Onagraceae > The evening-primrose family.

Oenothera suffrutescens

Scarlet gaura, scarlet beeblossom, wild honeysuckle, linda tarde = Gaura coccinea Onagraceae > The evening-primrose family.

Oenothera tanacetifolia

Tansyleaf evening-primrose Onagraceae > The evening-primrose family.

Oldenlandia corymbosa

Flat-top mille graines Rubiaceae > The madder family.

Onobrychis viciifolia

Sainfoin, St. Foin, holy-grass, holy-clover, sandfain Fabaceae = Leguminosae > The pea family.

Onopordum acanthium

This species is not part of the Interactive Identification Guide.

Scotch thistle, cotton thistle, Scottish thistle Asteraceae = Compositae > The sunflower family.

photo of Onopordum acanthium — Onopordum acanthium: Most images are available for commercial use.

Oplismenus hirtellus

Poaceae = Gramineae > The grass family. wavyleaf basketgrass

Opuntia polyacantha

Plains prickly-pear, hairspine cactus, panhandle prickly-pear, starvation prickly-pear Cactaceae = The cactus family.

Opuntia stricta

Common prickly-pear, erect prickly-pear Cactaceae = The cactus family.

Oreocarya celosioides

Buttecandle, miner's-candle, clustered oreocarya, cryptanthe = Cryptantha celosioides Boraginaceae > The borage family.

Origanum vulgare

Oregano Lamiaceae = Labiatae > The mint family.

Ornithogalum umbellatum

Common star-of-Bethlehem, bird's milk, chincherinchee, dove's-dung, nap-at-noon, pigeon-dung, sleepy-Dick, snowdrop, snowdrops, star-flower, star-of-Bethlehem, starflower, summer snowflake, ten o'clock lady Hyacinthaceae > The hyacinth family. Formerly in the Liliaceae.

Orobanche minor

Little broomrape, hellroot, common broomrape, lesser broomrape, small broomrape, clover broomrape Orobanchaceae > The broomrape family.

Orobanche uniflora

One-flowered broomrape, one-flowered cancer-root, ghostpipe, naked broomrape Orobanchaceae > The broomrape family.

Orontium aquaticum

Goldenclub, never-wet Araceae > The arum family.

Orthocarpus hispidus

Hairy owl-clover Orobanchaceae > The broomrape family. Formerly in the Scrophulariaceae.

Oryzopsis hymenoides

Indian ricegrass, sand ricegrass Poaceae = Gramineae > The grass family.

Osmorhiza berteroi

Mountain sweet-cicely = Osmorhiza chilensis Apiaceae = Umbelliferae > The parsley family.

Osmorhiza occidentalis

Western sweet-cicely, western sweetroot Apiaceae = Umbelliferae > The parsley family.

Osteospermum ecklonis

African daisy, sailor-boy daisy, Cape marguerite, Van Staden's river-daisy, white daisy bush, blue-and-white daisy bush, Star of the veldt Asteraceae = Compositae > The sunflower family.

Oxalis articulata

Bent wood-sorrel, jointed wood-sorrel, pink oxalis, pink wood-sorrel Oxalidaceae > The wood-sorrel family.

Oxalis corniculata

reeping woodsorrel, procumbent yellow-sorrel, sleeping beauty Oxalidaceae > The wood-sorrel family.

Oxalis debilis

Large flowered pink woodsorrel, lilac oxalis, pink shamrock, violet wood-sorrel, violet woodsorrel Oxalidaceae > The wood-sorrel family.

Oxalis pes-caprae

Bermuda buttercup, African wood-sorrel, Bermuda sorrel, buttercup oxalis, Cape sorrel, English weed, goat's-foot, sourgrass, soursob, soursop Oxalidaceae > The wood-sorrel family.

Panicum aciculare

Needleleaf rosettegrass, needleleaf witchgrass = Dichanthelium aciculare Poaceae = Gramineae > The grass family.

Panicum capillare

Witchgrass,tumbleweedgrass, witches-hair Poaceae = Gramineae > The grass family.

Panicum ciliatum

Roughhair rosettegrass = Dichanthelium strigosum Poaceae = Gramineae > The grass family.

Panicum dichotomiflorum

Fall panicum, fall panicgrass, autumn millet, Kliengrass Poaceae = Gramineae > The grass family.

Panicum laxiflorum

Openflower rosettegrass = Dichanthelium laxiflorum Poaceae = Gramineae > The grass family.

Panicum miliaceum

Wild proso-millet, proso-millet, broomcorn millet, common millet, broomtail millet, hog millet, red millet, white millet Poaceae = Gramineae > The grass family.

Panicum obtusum

Vine mesquite (one of the worst common names I have encountered)! = Hopia obtusa Poaceae = Gramineae > The grass family.

Panicum repens

Torpedograss, creeping panic, panic rampant, couch panicum, wainaku-grass, quackgrass, dog-tooth-grass, bulletgrass Poaceae = Gramineae > The grass family.

Panicum virgatum

Switchgrass, tall panicgrass, Wobsqua grass, blackbent, tall prairiegrass, wild redtop, thatchgrass, Virginia switchgrass Poaceae = Gramineae > The grass family.

Papaver argemone

Pricklyhead poppy, pale poppy Papaveraceae > The poppy family.

Papaver dubium

Long-headed poppy, blind-eyes Papaveraceae > The poppy family.

Papaver nudicaule

Papaveraceae > The poppy family.

Papaver orientale

Oriental poppy Papaveraceae > The poppy family.

Papaver rhoeas

Common poppy, corn poppy, corn rose, field poppy, Flanders poppy, red poppy, red weed, coquelicot, headache, headwark Papaveraceae > The poppy family.

Papaver somniferum

Papaveraceae > The poppy family.

Parapholis strigosa

Strigose sicklegrass, slender sicklegrass, sea hardgrass Poaceae = Gramineae > The grass family.

Parentucellia viscosa

Sticky parentucellia, sticky bartsia, tarweed, yellow bartsia, yellow glandweed Orobanchaceae > The broomrape family. Formerly in the Scrophulariaceae.

Parietaria floridana

Florida pellitory Urticaceae > The stinging-nettle family.

Parietaria pensylvanica

Pennsylvania pellitory Urticaceae > The stinging-nettle family.

Parthenium hysterophorus

Parthenium, Santa Maria feverfew, whitetop weed, famine weed, congress weed Asteraceae = Compositae > The sunflower family.

Parthenocissus incerta

Thicket Creeper, false Virginia creeper, grape woodbine = Partenocissus vitacea Vitaceae > The grape family.

Parthenocissus quinquefolia

Virginia creeper, American ivy, American woodbine, false grape, five-leaved ivy, five-leaves, true Virginia creeper, wild wood-vine, woodbine Vitaceae > The grape family.

Parthenocissus tricuspidata

Boston ivy, Japanese ivy, Japanese creeper = Ampelopsis tricuspidata Vitaceae > The grape family.

Paspalum notatam

Bahiagrass Poaceae = Gramineae > The grass family.

Paspalum setaceum

Paspalum, thin paspalum, bull paspalum Poaceae = Gramineae > The grass family.

Paspalum urvillei

Vasey's grass, Vaseygrass Poaceae = Gramineae > The grass family.

Passiflora caerulea

Blue passion flower, common passion flower Passifloriaceae > The passion flower family.

Passiflora incarnata

Purple passionflower, purple passion vine, maypop, apricot vine Passifloriaceae > The passion flower family.

Pastinaca sativa

Parsnip, wild parsnip Apiaceae = Umbelliferae > The parsley family.

Paulownia tomentosa

Princess tree, empress tree, foxglove tree, kiri Paulowniaceae > The princess tree family.

Pectinatella magnifica

Magnificent bryozoan Certainly non sequitur here, but something I often get questions about...

Pectis prostrata

Spreading cinchweed; chicken-weed Asteraceae = Compositae > The sunflower family.

Pectocarya recurvata

curvenut combseed, arched-nut pectocarya Boraginaceae > The borage family.

Pedicularis bracteosa

Bracted lousewort Orobanchaceae > The broomrape family. Formerly in the Scrophulariaceae.

Peganum harmala

African rue, esfand, wild rue, Syrian rue, harmel, aspand Nitrariaceae > The African rue family. Formerly in the Zygophyllaceae.

Pennisetum glaucum

Pearl millet, bulrush millet, cattail millet Poaceae = Gramineae > The grass family.

Pennisetum purpureum

Elephantgrass, Napiergrass, Ugandagrass Poaceae = Gramineae > The grass family.

Pennisetum setaceum

Oriental fountaingrass, red fountaingrass, purple fountaingrass Poaceae = Gramineae > The grass family.

Pentaglottis sempervirens

Green alkanet, evergreen bugloss, alkanet Boraginaceae > The borage family. Often confused with Anchusa officinalis

Peperomia pellucida

Pepper elder, shining bush-plant, man-to-man Piperaceae > The black pepper family.

Perideridia gairdneri

Yampa, Gairdner's yampah, common yampah Apiaceae = Umbelliferae > The parsley family.

Perilla frutescens

Mint perilla, perilla mint, Chinese basil, wild basil Lamiaceae = Labiatae > The mint family.

Perityle emoryi

Desert rockdaisy, Emory's rockdaisy Asteraceae = Compositae > The sunflower family.

Persicaria capitata

Pink-head knotweed, pink knotweed, Japanese knotweed pink bubble persicaria Polygonaceae > The rhubarb family.

Petasites frigidus

Arctic butterbur, Arctic sweet colt's-foot Asteraceae = Compositae > The sunflower family.

Petasites japonica

Fuki, bog rhubarb, Japanese sweet colt's-foot, giant butterbur Asteraceae = Compositae > The sunflower family.

Petroselinum crispum

Parsley Apiaceae = Umbelliferae > The parsley family.

Petunia axillaris

Garden petunia Solanaceae > The nightshade family.

Peucephyllum schottii

Pygmy cedar, Schott's pygmy cedar, desert fir, desert pine Asteraceae = Compositae > The sunflower family.

Phacelia crenulata

Notch-leaf scorpion-weed, notch-leaved phacelia, cleftleaf wild-heliotrope, heliotrope phacelia Boraginaceae > The borage family. Formerly in the Hydrophyllaceae.

Phacelia hastata

Silverleaf scorpionweed, silverleaf phacelia, white-leaf phacelia Boraginaceae > The borage family. Formerly in the Hydrophyllaceae.

Phacelia heterophylla

Vari-leaf phacelia, variable-leaf scorpion-weed, virgate phacelia, wand phacelia Boraginaceae > The borage family. Formerly in the Hydrophyllaceae.

Phalaris arundinacea

Reed canarygrass (often mis-used as Reed's canarygrass) Poaceae = Gramineae > The grass family.

Phalaris caroliniana

Carolina canarygrass, maygrass Poaceae = Gramineae > The grass family.

Phalaris minor

Small canarygrass,little-seed canarygrass, small-seeded canarygrass, lesser canarygrass Poaceae = Gramineae > The grass family.

Phalaris paradoxa

Hood canarygrass, awned canarygrass Poaceae = Gramineae > The grass family.

Phaseolus sp.

Fabaceae = Leguminosae > The pea family.

Philadelphus lewisii

Syringa, mock-orange Hydrangaceae > The hydrangea family.

Phleum pratense

This species is not part of the Interactive Identification Guide.

Timothy, common timothy, meadow cat's-tail, common cat's tail (not to be confused with cattail) Poaceae = Gramineae > The grass family.

photo of Phleum pratense — Phleum pratense: Most images are available for commercial use.

Phoradendron leucarpum

Santalaceae > The sandalwood family. Formerly in the Viscaceae. American mistletoe, eastern mistletoe, hairy mistletoe, oak mistletoe

Photinia serratifolia

Taiwanese photinia, Chinese photinia Rosaceae > The rose family.

Phragmites australis

Common reed Poaceae = Gramineae > The grass family.

Phyla lanceolata

Lanceleaf fogfruit, lanceleaf frogfruit = Lippia lanceolata Verbenaceae > The verbena family.

Phyla nodiflora

Frog fruit, sawtooth fogfruit, turkey tangle frogfruit = Lippia nodiflora Verbenaceae > The verbena family.

Phyllanthus tenellus

Mascarene Island leaf-flower Phyllanthaceae > The phyllanthus family. Formerly in the Urticaceae.

Phyllanthus urinaria

Leaf-flower, chamber bitter, gripeweed, shatterstone, stonebreaker, leafflower Phyllanthaceae > The phyllanthus family. Formerly in the Urticaceae.

Physalis alkekengi

Chinese lantern, bladder cherry, Japanese-lantern, strawberry groundcherry, winter-cherry = Alkekengi officinarum Solanaceae > The nightshade family.

Physalis angulata

Cutleaf groundcherry, angular winter-cherry, balloon cherry, gooseberry, hogweed, wild tomato Solanaceae > The nightshade family.

Physalis hederifolia

Ivy-leaf ground-cherry Solanaceae > The nightshade family.

Physalis longifolia

Longleaf groundcherry, common groundcherry, wild tomatillo Solanaceae > The nightshade family.

Physalis philadelphica

Wild tomatillo, Mexican groundcherry Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Solanaceae > The nightshade family.

Physalis pruinosa

Cape gooseberry, husk tomato, strawberry tomato Solanaceae > The nightshade family.

Physalis walteri

Walter's groundcherry Solanaceae > The nightshade family.

Physaria geyeri

Geyer's twinpod, Geyer's bladderpod Brassicaceae = Cruciferae > The mustard family. A native wildflower

Physocarpus malvaceus

Mallow ninebark, few-flowered ninebark, mallow ninebark, mallowleaved ninebark, mountain ninebark, ninebark, shallow ninebark Rosaceae > The rose family.

Physostegia virginiana

Obedient plant, obedience, false dragonhead Lamiaceae = Labiatae > The mint family.

Phyteuma scheuchzeri

Horned rampion Campanulaceae > The bellflower family.

Phyteuma scorzonerifolia

Scorzonera-leaved rampion Campanulaceae > The bellflower family.

Phytolacca americana

Pokeweed, poke-salad, inkberry, pigeonberry, poke, pokeberry Phytolaccaceae > The pokeweed family.

Picris echioides

Bristly oxtongue Asteraceae = Compositae > The sunflower family.

Pilea microphylla

This species is not part of the Interactive Identification Guide.

Artillery-plant, gunpowder-plant, miltary fern, rockweed Urticaceae > The stinging-nettle family.

photo of Pilea microphylla — Pilea microphylla: Most images are available for commercial use.

Pinus edulis

Piñon pine, New Mexican pine, Colorado pine, mesa pine, pinyon pine Pinaceae > The pine family.

Piriqueta cistoides

Pitted stripeseed Turneraceae > The Turnera family.

Pistia stratiotes

Water lettuce, water cabbage, Nile cabbage, tropical duckweed, shellflower Araceae > The arum family.

Pisum sativum

Pea,garden pea, field pea Fabaceae = Leguminosae > The pea family.

Plagiobothrys scouleri

Scouler's popcornflower Boraginaceae > The borage family.

Plantago arenaria

Sand plantain = Plantago psyllium Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Plantaginaceae > The plantain family.

Plantago coronopus

Buck's-horn plantain, minutina, erba stella Plantaginaceae > The plantain family.

Plantago lanceolata

English plantain, narrowleaf plantain, ribwort plantain, ribleaf, buckhorn plantain, buckhorn, lamb's-tongue Plantaginaceae > The plantain family.

Plantago major

Broadleaf plantain, Broad-leaved plantain, common plantain, cart-track plant, dooryard plantain, greater plantain, healing-blade, hen-plant, lamb's-foot, roadweed, roundleaf plantain Plantaginaceae > The plantain family.

Plantago media

Hoary plantain, gray ribwort, woolly plantain Plantaginaceae > The plantain family.

Plantago ovata

Desert Indianwheat, desert plantain, blonde psyllium, white psyllium, Indian plantain Plantaginaceae > The plantain family.

Plantago patagonica

Wooly plantain, wooly Indianwheat = Plantago purshii Plantaginaceae > The plantain family.

Plantago rugelii

American plantain, blackseed plantain, pale plantain, Rugel's plantain Plantaginaceae > The plantain family.

Platanus x acerifolia

London plane-tree A hybrid of American and European species, commonly planted as a street tree. Platanaceae > The sycamore family

Platycodon grandiflorus

Balloon-flower, Chinese-bellflower, platycodon Campanulaceae > The bellflower family.

Plectritis macrocera

longhorn plectritis, white cornsalad, white plectritis, longhorn seablush Valerianaceae > The valerian family.

Pluchea odorata

Sweetscent, salt marsh fleabane, shrubby camphorweed. Asteraceae = Compositae > The sunflower family.

Plumbago auriculata

Blue plumbago, Cape plumbago Cape leadwort Plumbaginaceae > The leadwort family.

Poa annua

Annual bluegrass Poaceae = Gramineae > The grass family.

Poa bulbosa

Bulbous bluegrass Poaceae = Gramineae > The grass family.

Poa compressa

This species is not part of the Interactive Identification Guide.

Canada bluegrass, flat-stem bluegrass Poaceae = Gramineae > The grass family.

photo of Poa compressa — Poa compressa: Most images are available for commercial use.

Poa pratensis

Kentucky bluegrass, smooth meadow-grass, common meadow-grass Poaceae = Gramineae > The grass family.

Poa trivialis

rough bluegrass; rough-stalked meadow-grass, rough meadow-grass Poaceae = Gramineae > The grass family.

Polemonium micranthum

Annual polemonium, annual Jacob's-ladder Polemoniaceae > The phlox family.

Polemonium occidentale

western polemonium, western Jacob's-ladder A native wildflower. Polemoniaceae > The phlox family.

Polycarpon tetraphyllum

Fourleaf allseed, fourleaf manyseed Caryophyllaceae > The chickweed family.

Polygala grandiflora

Showy milkwort Polygalaceae > The milkwort family.

Polygala lutea

Orange milkwort Polygalaceae > The milkwort family.

Polygala vulgaris

Common milkwort Polygalaceae > The milkwort family.

Polygonatum biflorum

Solomon's-seal, smooth Solomon's-seal Ruscaceae > The butcher’s-broom family. Formerly in the Liliaceae.

Polygonum achoreum

Striate knotweed, Blake's knotweed, leathery knotweed Polygonaceae > The rhubarb family.

Polygonum aviculare

Prostrate knotweed, doorweed, knotgrass, wiregrass, yard knotweed Polygonaceae > The rhubarb family.

Polygonum baldschuanicum

silver lace-vine, Russian vine, Bukhara fleeceflower, Chinese fleecevine, mile-a-minute, Jacob's fleece = Polygonum aubertii, Fallopia baldschuanica Polygonaceae > The rhubarb family.

Polygonum convolvulus

Wild buckwheat, black-bindweed = Fallopia convolvulus Polygonaceae > The rhubarb family.

Polygonum cuspidatum

Japanese knotweed, crimson beauty, Japanese bamboo,Mexican bamboo, Japanese fleece flower = Fallopia japonica, Reynoutria japonica Polygonaceae > The rhubarb family. Many of the images shown here may actually be Polygonum bohemicum, a hybrid of P. cuspidatum and P. sachalinense that has recently been described and is difficult to distinguish using only photos.

Polygonum douglasii

Douglas' knotweed Polygonaceae > The rhubarb family.

Polygonum hydropiperoides

swamp smartweed, false waterpepper = Persicaria hydropiperoides Polygonaceae > The rhubarb family.

Polygonum lapathifolium

pale smartweed, pale knotweed, curlytop knotweed, willow-weed = Persicaria lapathifolia Polygonaceae > The rhubarb family.

Polygonum majus

Wiry knotweed Polygonaceae > The rhubarb family.

Polygonum orientale

Oriental pepper, Prince's feather, Prince's plume, tall persicaria, kiss-me-over-the-garden-gate = Persicaria orientalis Polygonaceae > The rhubarb family.

Polygonum perfoliatum

Mile-a-minute weed, devil's tail, giant climbing-tearthumb, Asiatic tearthumb = Persicaria perfoliata Polygonaceae > The rhubarb family.

Polygonum persicaria

lady's thumb, spotted lady's thumb, Jesusplant, redshank = Persicaria maculosa Polygonaceae > The rhubarb family.

Polygonum polygaloides

Milkwort knotweed, polygala knotweed Polygonaceae > The rhubarb family.

Polygonum polystachyum

Himalayan knotweed, cultivated knotweed, bell-shaped knotweed = Persicaria wallichii Polygonaceae > The rhubarb family.

Polygonum sachalinense

Giant knotweed, elephant-ear bamboo, Sachalin knotweed = Reynoutria sachalinensis Polygonaceae > The rhubarb family.

Polygonum sagittatum

American tearthumb, arrowleaf tearthumb, arrowvine = Persicaria sagittata Polygonaceae > The rhubarb family.

Polygonum scandens

Climbing buckwheat = Fallopia scandens Polygonaceae > The rhubarb family.

Polypogon monspeliensis

Rabbit's-foot grass, annual beardgrass, annual rabbit's-foot grass, beardgrass, bearded grass, Montpelier beardgrass, rabbit's-foot beardgrass, rabbit's-foot polypogon, rabbitsfoot Poaceae = Gramineae > The grass family.

Polypogon viridis

Beardless rabbit's-foot grass Poaceae = Gramineae > The grass family.

Polypremum procumbens

Juniper-leaf rustweed Tetrachondraceae > The rustweed family. Formerly in the Buddlejaceae.

Poncirus trifoliata

Bitter orange, hardy orange, trifoliate orange, Japanese hardy-orange The dwarf form with curved spines is called "Flying Dragon" and has sometimes been given the common name "pain and terror" See: http://articles.orlandosentinel.com/1988-09-06/news/0060420012_1_shivers-trifoliate-orange-pain-and-terror = Citrus trifoliata Rutaceae > The rue family.

Pontederia cordata

Pickerelweed Pontederiaceae > The pickerelweed family.

Populus alba

white poplar, silver poplar, silverleaf poplar Salicaceae > The willow family.

Populus deltoides

Eastern cottonwood, Alamo, Carolina poplar, necklace poplar Salicaceae > The willow family.

Populus trichocarpa

Black cottonwood, western balsam-poplar, California poplar Salicaceae > The willow family.

Portulaca amilis

Paraguayan purslane Portulacaceae > The purslane family.

Portulaca grandiflora

Moss-rose purslane, eleven o'clock, Mexican rose, moss-rose, sun-rose, rock-rose Portulacaceae > The purslane family.

Portulaca oleracea

Common purslane, pigweed, little hogweed, red root, pursley, verdolaga, Portulacaceae > The purslane family.

Portulaca pilosa

Rose-flowered purslane, penawar, pigweed, pink purslane, kiss-me-quick, shaggy portulaca, hairy portulaca, seashore purslane Portulacaceae > The purslane family.

Potamogeton amplifolius

Big-leaf pondweed Potamogetonaceae > The pondweed family.

Potamogeton crispus

Curly pondweed, curly-leaf pondweed Potamogetonaceae > The pondweed family.

Potamogeton illinoensis

Illinois pondweed Potamogetonaceae > The pondweed family.

Potentilla anserina

common silverweed, silverweed cinquefoil, silverweed Rosaceae > The rose family.

Potentilla argentea

This species is not part of the Interactive Identification Guide.

silver cinquefoil, silvery cinquefoil, five-fingers, star-flower Rosaceae > The rose family.

photo of Potentilla argentea — Potentilla argentea: Most images are available for commercial use.

Potentilla glandulosa

Sticky cinquefoil = Drymocallis glandulosa Rosaceae > The rose family.

Potentilla gracilis

Graceful cinquefoil This highly variable native wildflower is often confused with the invasive P. recta Rosaceae > The rose family.

Potentilla neumanniana

Ground-cover potentilla Rosaceae > The rose family.

Potentilla palustris

Purple marshlocks, swamp cinquefoil, marsh cinquefoil Rosaceae > The rose family.

Potentilla recta

Sulfur cinquefoil, rough-fruited cinquefoil Rosaceae > The rose family.

Potentilla supina

This species is not part of the Interactive Identification Guide.

Bushy cinquefoil = Potentilla paradoxa Rosaceae > The rose family.

photo of Potentilla supina — Potentilla supina: Most images are available for commercial use.

Poteridium annuum

Annual burnet, small burnet, prairie burnet = Sanguisorba occidentalis Rosaceae > The rose family.

Poterium sanguisorba

Salad burnet = Sanguisorba minor Rosaceae > The rose family.

Proboscidea louisianica

Devil's-claw, unicorn-plant, ram's horn, Louisiana unicorn-plant, purple-flowered devil's-claw, goat's head, elephant tusks Sometimes spelled P. louisiana Martyniaceae > The unicorn-plant family.

Prunella vulgaris

Selfheal, allheal, lance lelfheal, Aleutian selfheal, heal-all, carpenter-weed, heart-of-the-earth, Lamiaceae = Labiatae > The mint family.

Prunus angustifolia

Chickasaw plum Rosaceae > The rose family.

Prunus avium

Wild cherry (bird cherry often misapplied) Rosaceae > The rose family.

Prunus caroliniana

Cherry-laurel, Carolina laurel-cherry Rosaceae > The rose family.

Prunus cerasifera

Cherry plum, myrobalan plum, Newport cherry-plum, pissard plum Rosaceae > The rose family.

Prunus domestica

Common plum, domestic plum Rosaceae > The rose family.

Prunus laurocerasus

Common laurel,cherry laurel, English laurel Rosaceae > The rose family.

Prunus mahaleb

Mahaleb cherry, St. Lucie cherry Rosaceae > The rose family.

Prunus spinosa

Sloe (as in sloe gin), blackthorn, sloe plum Rosaceae > The rose family.

Prunus virginiana

Chokecherry, bitter-berry, Virginia bird-cherry, western chokecherry Rosaceae > The rose family.

Pseudofumaria lutea

Yellow corydalis, yellow fumitory, hollowort, yellow larkspur = Corydalis lutea Fumariaceae > The fumitory family.

Pseudognaphalium canescens

Wright’s Cudweed, San Diego rabbit-tobacco, Felt-leaf Everlasting Asteraceae = Compositae > The sunflower family.

Pseudognaphalium luteoalbum

Jersey cudweed, weedy cudweed = Helichrysum luteoalbum Asteraceae = Compositae > The sunflower family.

Pseudognaphalium obtusifolium

Old-field balsam, rabbit tobacco, sweet everlasting Asteraceae = Compositae > The sunflower family.

Pseudognaphalium stramineum

Chilean cudweed, everlasting cudweed, small flowered cudweed, annual cudweed, cotton-batting plant = Gnaphalium chilensis Asteraceae = Compositae > The sunflower family.

Pseudotsuga menziesii

This species is not part of the Interactive Identification Guide.

Psilocarphus oreganus

Oregon woolyheads Asteraceae = Compositae > The sunflower family.

Psilocarphus tenellus

Slender woollyheads, slender woolly-marbles Asteraceae = Compositae > The sunflower family.

Psoralidium lanceolatum

Lemon scurfpea, lanceleaf scurfpea = Psoralea lanceolata = Ladeanea lanceolata Fabaceae = Leguminosae > The pea family.

Pteridium aquilinum

Bracken fern, bracken, common bracken, brake, eagle fern Dennstaedtiaceae > The bracken fern family.

Pterocaulon pycnostachyum

Dense-spike blackroot, fox-tail blackroot, coastal blackroot Asteraceae = Compositae > The sunflower family.

Pterospora andromedea

Pinedrops Ericaceae > The heath family.

Puccinelia distans

Spreading alkaligrass Poaceae = Gramineae > The grass family.

Pulmonaria saccharata

Bethlehem sage, lungwort Boraginaceae > The borage family.

Purshia tridentata

Bitterbrush, antelope bitterbrush, antelope brush, buckbrush, quinine brush, deerbrush, blackbrush Rosaceae > The rose family.

Pyrostegia venusta

Flame vine, golden shower, Chinese cracker-flower Bignoniaceae > The trumpet-creeper family.

Pyrrhopappus carolinianus

Carolina desert-chicory, Carolina false-dandelion Asteraceae = Compositae > The sunflower family.

Pyrus calleryana

Callery pear, Bradford pear Rosaceae > The rose family.

Quercus laurifolia

Darlington oak, diamond-leaf oak, swamp-laurel oak, laurel-leaf oak, water oak, obtusa oak Fagaceae > The oak family.

Quercus marilandica

blackjack oak, black oak, jack oak, scrub oak, barren oak Fagaceae > The oak family.

Rafinesquia neomexicana

Desert chicory, plumeseed, New Mexico plumeseed Asteraceae = Compositae > The sunflower family.

Ranunculus acriformis

Sharp-leaf buttercup Ranunculaceae > The buttercup family.

Ranunculus aquatilis

White water-buttercup, water-crowfoot, white water-crowfoot Ranunculaceae > The buttercup family.

Ranunculus arvensis

Corn buttercup, field buttercup, devil-on-all-sides, scratch bur Ranunculaceae > The buttercup family.

Ranunculus cymbalaria

Alkali buttercup, seaside buttercup Ranunculaceae > The buttercup family.

Ranunculus ficaria

Fig buttercup, lesser celandine Ranunculaceae > The buttercup family.

Ranunculus flabellaris

Yellow water-buttercup Ranunculaceae > The buttercup family.

Ranunculus repens

Creeping buttercup, prairie double-flowered buttercup, water buttercup Ranunculaceae > The buttercup family.

Ranunculus sceleratus

Cursed buttercup, celery-leaved buttercup Ranunculaceae > The buttercup family.

Ranunculus uncinatus

woodland buttercup, little buttercup Ranunculaceae > The buttercup family.

Raphanus raphanistrum

Wild radish, cadlock, charlock, jointed charlock, jointed radish, pointed charlock, radish, white charlock, wild charlock Brassicaceae = Cruciferae > The mustard family.

Raphanus sativus

Cultivated radish, radish, garden radish, wild radish Brassicaceae = Cruciferae > The mustard family.

Ratibida columnifera

Long-headed coneflower, prairie coneflower Asteraceae = Compositae > The sunflower family.

Reseda luteola

Resedaceae > The mignonette family. Dyer's rocket, dyer's weed, weld, woold, yellow weed

Rhamnus purshiana

Rhamnaceae > The buckthorn family.

Rhaponticum repens

Russian knapweed = Centaurea repens, Acroptilon repens Asteraceae = Compositae > The sunflower family.

Rheum rhabarbarum

Rhubarb, common rhubarb, pie-plant Polygonaceae > The rhubarb family.

Rhexia mariana

Maryland meadow-beauty Melastomataceae > The meadow-beauty family.

Rhinanthus minor

Yellow-rattle, little yellow-rattle, cock's-comb = Rhinanthus crista-galli This is a sample sent from a bale of hay, the most common way I see the plant! Orobanchaceae > The broomrape family. Formerly in the Scrophulariaceae.

Rhus aromatica

Fragrant sumac, aromatic sumac = Rhus trilobata Anacardiaceae > The sumac family.

Rhus copallinum

Winged sumac, black sumac, dwarf sumac, flameleaf sumac, mountain sumac, prairie sumac, shiny sumac, southern sumac Anacardiaceae > The sumac family.

Rhus glabra

Smooth sumac, common sumac, scarlet sumac, upland sumac Anacardiaceae > The sumac family.

Rhus typhina

Staghorn sumac, velvet sumac, fuzzy sumac, hairy sumac Anacardiaceae > The sumac family.

Rhynchospora colorata

Star-grass, white star-sedge, starrush white-sedge Cyperaceae > The sedge family.

Ribes aureum

Golden currant, buffalo currant Grossulariaceae > The currant family.

Ribes sanguineum

Blood currant, redflower currant, winter currant, pink-flowering currant Grossulariaceae > The currant family.

Richardia brasiliensis

Tropical Mexican clover, Brazilian calla-lily, white-eye, Brazil pusley Rubiaceae > The madder family.

Richardia grandiflora

Largeflower Mexican-clover Rubiaceae > The madder family.

Richardia scabra

Florida pusley. Rough Mexican clover Rubiaceae > The madder family.

Ricinus communis

Castor-bean Euphorbiaceae > The spurge family.

Robinia hispida

Fabaceae = Leguminosae > The pea family.

Robinia pseudoacacia

Black locust, Robinia, false Acacia Fabaceae = Leguminosae > The pea family.

Romneya coulteri

Coulter's matilija poppy Papaveraceae > The poppy family.

Rorippa austriaca

Austrian yellowcress, Austrian fieldcress Brassicaceae = Cruciferae > The mustard family.

Rorippa nasturtium-aquaticum

Watercress = Nasturtium officinale Brassicaceae = Cruciferae > The mustard family.

Rorippa palustris

Yellowcress, bog marshcress, bog yellowcress, common yellowcress, marsh yellowcress, marshcress, yellow watercress Brassicaceae = Cruciferae > The mustard family.

Rosa canina

Dog rose, Brier hip, dog brier fruit, hipberries, witches brier, hip tree, hip fruit, hop fruit Rosaceae > The rose family.

Rosa eglanteria

Sweetbriar, sweetbriar rose, eglantine = Rosa rubiginosa Rosaceae > The rose family.

Rosa gymnocarpa

Dwarf rose, baldhip rose Rosaceae > The rose family.

Rosa multiflora

Multiflora rose = Rosa polyantha Rosaceae > The rose family.

Rosa nutkana

Nutka rose Rosaceae > The rose family.

Rosa rugosa

Rugosa rose, Japanese rose, Ramanas rose, beach rose Rosaceae > The rose family.

Rosa woodsii

Wood's rose Rosaceae > The rose family.

Rosmarinus officinalis

Rosemary Lamiaceae = Labiatae > The mint family.

Rubus armeniacus

Himalayan blackberry, Armenian blackberry = Rubus discolor Rosaceae > The rose family.

Rubus laciniatus

Cutleaf blackberry, cut-leaved blackberry, evergreen blackberry, Rosaceae > The rose family.

Rubus leucodermis

Whitebark raspberry, whitestem raspberry, blackcap, black raspberry, western raspberry Rosaceae > The rose family.

Rubus parviflorus

Thimbleberry One of the best "wild-charmin" plants! Rosaceae > The rose family.

Rubus phoenicolasius

Wine berry, wine raspberry Rosaceae > The rose family.

Rudbeckia laciniata

Cutleaf coneflower, goldenglow, green-headed coneflower, tall coneflower Asteraceae = Compositae > The sunflower family.

Rudbeckia maxima

Great coneflower, black-eyed-Susan Asteraceae = Compositae > The sunflower family.

Rudbeckia mollis

Softhair coneflower Asteraceae = Compositae > The sunflower family.

Rudbeckia occidentalis

Western coneflower Asteraceae = Compositae > The sunflower family.

Rudbeckia triloba

Brown-eyed Susan, branched coneflower, thin-leaved coneflower, three-lobed coneflower Asteraceae = Compositae > The sunflower family.

Ruellia caroliniana

Wild petunia Ruellia carolinianaAcanthaceae > The acanthus family.

Rumex acetosa

Common sorrel, garden sorrel, sorrel Polygonaceae > The rhubarb family.

Rumex acetosella

Sheep sorrel, red sorrel, sour dock, field sorrel Polygonaceae > The rhubarb family.

Rumex conglomeratus

Cluster dock, clustered dock, clustered green dock, dock, green dock, sharp dock Polygonaceae > The rhubarb family.

Rumex crispus

Curly dock, curled dock, curlyleaf dock, narrow dock, narrowleaf dock, sour dock, yellow dock Polygonaceae > The rhubarb family.

Rumex fueginus

Sea-side dock, American golden dock, Tierra del Fuego dock Very similar to the Eurasian Rumex maritima Polygonaceae > The rhubarb family.

Rumex hastatulus

Hastate-leaf dock, heartwing dock Polygonaceae > The rhubarb family.

Rumex obtusifolius

Broad-leaved dock, bitter dock, bluntleaf dock, dock leaf, butter dock Polygonaceae > The rhubarb family.

Rumex patientia

Patience Dock, English spinach, garden patience, herb patience, Monk's-rhubarb Polygonaceae > The rhubarb family.

Rumex salicifolius

Willow-leaved dock, willow dock Polygonaceae > The rhubarb family.

Rumex venosus

Veiny dock, winged dock, wild-begonia Polygonaceae > The rhubarb family.

Ruta graveolens

Rue, common rue, herb-of-grace Rutaceae > The rue family.

Saccharum ravennae

Plume grass, Ravenna grass, Italian sugarcane, giant cane, hardy pampas grass, Elephant grass = Erianthus ravennae Poaceae = Gramineae > The grass family.

Sacciolepis striata

American cupscale Poaceae = Gramineae > The grass family.

Sagina apetala

Annual pearlwort, dwarf pearlwort, sticky pearlwort Caryophyllaceae > The chickweed family.

Sagina procumbens

Procumbent pearlwort, birdeye pearlwort, matted pearlwort Caryophyllaceae > The chickweed family.

Sagittaria cuneata

Arumleaf arrowhead, duck potato, wapato Alismataceae > The water-plantain family.

Sagittaria lancifolia

Bulltongue arrowhead, duck potato, wapato Alismataceae > The water-plantain family.

Sagittaria latifolia

Broadleaf arrowhead, common arrowhead, duck potato Alismataceae > The water-plantain family.

Salicornia depressa

Virginia glasswort, creeping glasswort, American glasswort, woody glasswort, common pickleweed Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Salix caroliniana

Carolina willow, coastal-plain willow Salicaceae > The willow family.

Salix exigua

Coyote willow, sandbar willow, narrowleaf willow Salicaceae > The willow family.

Salsola tragus

Russian thistle, prickly Russian-thistle, tumbleweed, common Russian-thistle, tumbling thistle = Salsola iberica Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Salvia aethiopis

Mediterranean sage, African sage Lamiaceae = Labiatae > The mint family.

Salvia columbariae

Chia, Ziegler's sage Lamiaceae = Labiatae > The mint family.

Salvia lyrata

Lyre-leaf sage, lyreleaf sage, wild sage, cancerweed Lamiaceae = Labiatae > The mint family.

Salvia nemorosa

Meadow sage Lamiaceae = Labiatae > The mint family.

Salvia sclarea

Clary, clary sage Lamiaceae = Labiatae > The mint family.

Salvia verticillata

Lilac sage, whorled clary Lamiaceae = Labiatae > The mint family.

Salvinia minima

Common salvinia, water-spangles Salviniaceae > The floating fern family.

Sambucus caerulea

Blue elderberry = Sambucus cerulea Adoxaceae > The muskroot family. Formerly in the Caprifoliaceae.

Sambucus canadensis

Common elderberry, American elder = Sambucus nigra ssp. canadensis Adoxaceae > The muskroot family. Formerly in the Caprifoliaceae.

Sambucus nigra

Black elderberry Adoxaceae > The muskroot family. Formerly in the Caprifoliaceae.

Samolus parviflorus

Water pimpernel Primulaceae > The primrose family.

Sanvitalia speciosa

Baby-suns Asteraceae = Compositae > The sunflower family.

Saponaria ocymoides

Tumbling-Ted, basil soapwort, rock soapwort Caryophyllaceae > The chickweed family.

Saponaria officinalis

Soapwort, bouncing-bet, crow soap, wild sweet William, soapweed Caryophyllaceae > The chickweed family.

Sarcobatus vermiculatus

Greasewood, black greasewood, chicobush, chico Sarcobataceae > The greasewood family. Formerly in the Chenopodiaceae.

Scandix pecten-veneris

Venus' comb, shepherd's-needle, Venus' needle Some photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Apiaceae = Umbelliferae > The parsley family.

Schedonnardus paniculatus

Tumblegrass, Texas crabgrass, wiregrass Poaceae = Gramineae > The grass family.

Schedonorus arundinaceus

Tall fescue, reed fescue = Festuca arundinacea Poaceae = Gramineae > The grass family.

Schedonorus pratensis

Meadow fescue = Festuca pratensis Poaceae = Gramineae > The grass family.

Schismus arabicus

Arabian grass, Arabian schismus, Mediterranean grass, schismus, split grass Poaceae = Gramineae > The grass family.

Schismus barbatus

Common Mediterranean grass Poaceae = Gramineae > The grass family.

Schizachyrium scoparium

Povertygrass, little bluestem, broom bluestem, broom Poaceae = Gramineae > The grass family.

Scirpus acutus

Common tule, hardstem tule, tule rush, hardstem bulrush, viscid bulrush Cyperaceae > The sedge family.

Scirpus americanus

Olney's threesquare bulrush, Olney's three-square, Olney bulrush, Olney's tule, three-cornered grass, three-cornered sedge, three square sedge, bayonet rush, chairmaker's bulrush Cyperaceae > The sedge family.

Scirpus cyperinus

Cottongrass bulrush, woolgrass, brown woolly-sedge Cyperaceae > The sedge family.

Scirpus maritimus

Alkali bulrush, bayonet grass, sea clubrush, cosmopolitan bulrush, saltmarsh bulrush Cyperaceae > The sedge family.

Scirpus microcarpus

Panicled bulrush, smallfruit bulrush, barberpole bulrush Cyperaceae > The sedge family.

Scirpus pallidus

Cloaked bulrush Cyperaceae > The sedge family.

Scirpus validus

Softstem bulrush, great bulrush = Schoenoplectus tabernaemontani Cyperaceae > The sedge family.

Scleranthus annuus

German knotweed, German knotgrass, annual knawel Caryophyllaceae > The chickweed family.

Sclerochloa dura

Common hardgrass, fairground grass Poaceae = Gramineae > The grass family.

Scoparia dulcis

Licorice-weed, goatweed, scoparia-weed, sweet-broom Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Scrophularia californica

California figwort, California bee plant Scrophulariaceae > The snapdragon family.

Scrophularia lanceolata

Lanceleaf figwort, American figwort, early figwort Scrophulariaceae > The snapdragon family.

Scutellaria angustifolia

Narrowleaf skullcap Scrophulariaceae > The snapdragon family.

Scutellaria lateriflora

Blue skullcap, mad dog skullcap, Side-flowering skullcap Scrophulariaceae > The snapdragon family.

Secale cereale

Cereal rye Poaceae = Gramineae > The grass family.

Secale montanum

Mountain rye, perennial rye Poaceae = Gramineae > The grass family.

Securigera varia

Crown-vetch, purple crown-vetch = Coronilla varia Fabaceae = Leguminosae > The pea family.

Sedum acre

Common stonecrop, goldmoss stonecrop, goldmoss sedum Crassulaceae > The stonecrop family.

Sedum album

White stonecrop Crassulaceae > The stonecrop family.

Sedum arachnoideum

Cobweb houseleek, cobweb sedum = Sempervivum arachnoideum Crassulaceae > The stonecrop family.

Sedum oreganum

Oregon stonecrop, gree stonecrop Crassulaceae > The stonecrop family.

Sedum spathulifolium

Broadleaf stonecrop Crassulaceae > The stonecrop family.

Sedum spurium

Creeping stonecrop, two-row stonecrop, Caucasian stonecrop Crassulaceae > The stonecrop family.

Sedum stenopetalum

Worm-leaf stonecrop Crassulaceae > The stonecrop family.

Sempervivum tectorum

Common houseleek, hen-and-chicks Crassulaceae > The stonecrop family.

Senecio glomeratus

Cut-leaf burnweed, New Zealand fireweed, Australian burnweed Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. = Erechtites glomeratus Asteraceae = Compositae > The sunflower family.

Senecio hieraciifolius

American burnweed, fireweed, pilewort = Erechtites hieraciifolius Asteraceae = Compositae > The sunflower family.

Senecio hydrophilus

Alkali-marsh ragwort, water ragwort Asteraceae = Compositae > The sunflower family.

Senecio integerrimus

Western groundsel, lambstongue ragwort, tall western groundsel Asteraceae = Compositae > The sunflower family.

Senecio minimus

Coastal burnweed, toothed fireweed = Erechtites minimus Asteraceae = Compositae > The sunflower family.

Senecio pseudaureus

Falsegold groundsel, streambank groundsel Asteraceae = Compositae > The sunflower family.

Senecio serra

Sawtooth groundsel, tall ragwort Asteraceae = Compositae > The sunflower family.

Senecio sylvaticus

Woodland ragwort, woodland groundsel, mountain groundsel Asteraceae = Compositae > The sunflower family.

Senecio viscosus

Sticky groundsel, sticky ragwort Asteraceae = Compositae > The sunflower family.

Senecio vulgaris

Common groundsel, old-man-in-the-spring Asteraceae = Compositae > The sunflower family.

Senna obtusifolia

Sicklepod, Chinese senna, foetid cassia, sickle senna, coffeeweed, arsenic-weed, blunt-leaved senna, coffee pod, java bean Fabaceae = Leguminosae > The pea family.

Senna occidentalis

Coffee senna, septicweed, coffeeweed, Mogdad coffee, senna coffee, Stephanie coffee, stinkingweed, styptic weed Fabaceae = Leguminosae > The pea family.

Senna pendula

Christmas senna, Easter senna, golden shower, Christmas cassia Fabaceae = Leguminosae > The pea family.

Serenoa repens

Saw palmetto Arecaceae > The palmetto family.

Sesamum indicum

Sesame Pedaliaceae > The sesame family.

Sesbania herbacea

Hemp sesbania, coffee-bean, danglepod, coffeeweed, Colorado River-hemp, peatree, sesbania Fabaceae = Leguminosae > The pea family.

Sesbania vesicaria

Bagpod, bagpod sesbania Fabaceae = Leguminosae > The pea family.

Setaria faberi

Giant foxtail, Chinese foxtail, Chinese millet, giant bristlegrass, nodding foxtail, Japanese bristlegrass, tall green-bristlegrass Poaceae = Gramineae > The grass family.

Setaria geniculata

Knotroot bristlegrass = Setaria parviflora Poaceae = Gramineae > The grass family.

Setaria palmifolia

palmgrass, broadleaved bristlegrass, palmleaved bristlegrass Poaceae = Gramineae > The grass family.

Setaria pumila

Yellow foxtail, yellow bristlegrass, pigeon-grass, cattail grass = Setaria lutescens Poaceae = Gramineae > The grass family.

Setaria verticillata

Hooked bristlegrass, bristly foxtail, whorled pigeongrass Poaceae = Gramineae > The grass family.

Setaria viridis

Green foxtail, green bristlegrass, wild foxtail-millet Poaceae = Gramineae > The grass family.

Shepherdia canadensis

Buffalo-berry, russet buffalo-berry, Canada buffalo-berry, soapberry, silver buffalo-berry, rabbitberry Elaeagnaceae > The oleaster family.

Sibara virginica

Virginia winged-rockcress Brassicaceae = Cruciferae > The mustard family.

Sicyos angulatus

Burcucumber, oneseed bur-cucumber, star-cucumber Cucurbitaceae > The cucumber family.

Sida acuta

Common wireweed, morning mallow, common fanpetals Malvaceae > The mallow family.

Sida cordifolia

Heart-leaf sida, country mallow, flannel weed Malvaceae > The mallow family.

Sida rhombifolia

Arrowleaf sida, rhombus-leaved sida, Paddy's lucerne, jelly leaf, Cuban jute, Queensland hemp, Indian hemp Malvaceae > The mallow family.

Sida spinosa

Prickly sida, false mallow, Indian mallow, prickly fanpetals, prickly mallow, prickly-mallow, spiny sida, teaweed, thistle mallow Malvaceae > The mallow family.

Sidalcea oregana

Oregon checker-mallow, Oregon checkerbloom Malvaceae > The mallow family.

Silene antirrhina

Sleepy catchfly, sleepy silene Caryophyllaceae > The chickweed family.

Silene armeria

Catchfly, none-so-pretty Caryophyllaceae > The chickweed family.

Silene chalcedonica

Maltese-cross, Jerusalem cross, common rose-campion Caryophyllaceae > The chickweed family.

Silene conoidea

Cone catchfly, weed silene, large sand catchfly Caryophyllaceae > The chickweed family.

Silene latifolia

White cockle, white campion, bladder campion = Lychnis alba Caryophyllaceae > The chickweed family.

Silene vulgaris

Bladder campion, bird's eggs, blue root, bubble-poppy, cobwell, devil's rattlebox, maiden's tears, rattlebox, rattleweed, sea pink, snappery, white bottle, white hen = Silene cucubalus Caryophyllaceae > The chickweed family.

Silphium laciniatum

Compass-plant Asteraceae = Compositae > The sunflower family.

Silphium perfoliatum

Cup-plant Asteraceae = Compositae > The sunflower family.

Silybum marianum

Milk-thistle, blessed milk-thistle, Marian thistle, Mary thistle, Saint Mary's-thistle, Mediterranean milk-thistle, variegated thistle Asteraceae = Compositae > The sunflower family.

Sinapis alba

White mustard, yellow mustard Brassicaceae = Cruciferae > The mustard family.

Sinapis arvensis

Wild mustard, charlock mustard, field mustard, charlock Brassicaceae = Cruciferae > The mustard family.

Sisymbrium altissimum

Tumble mustard, Jim Hill mustard Brassicaceae = Cruciferae > The mustard family.

Sisymbrium irio

London rocket, rocket mustard Brassicaceae = Cruciferae > The mustard family.

Sisymbrium loeselii

Loesel tumble-mustard, small tumbleweed mustard, tall hedge mustard, false London rocket Brassicaceae = Cruciferae > The mustard family.

Sisymbrium officinale

Hedge mustard Brassicaceae = Cruciferae > The mustard family.

Sisymbrium orientale

Oriental mustard, eastern rocket, hedge mustard, Indian hedge mustard, Indian hedge-mustard, mustard, oriental hedge mustard, wild mustard Brassicaceae = Cruciferae > The mustard family.

Sisyrinchium californicum

Golden blue-eyed-grass, yellow-eyed-grass, golden-eyed-grass Iridaceae > The iris family.

Sisyrinchium rosulatum

Annual blue-eyed-grass, lawn blue-eyed-grass Iridaceae > The iris family.

Smilax auriculata

Earleaf greenbrier, wild-bamboo Smilaceae > The greenbrier family. Formerly in the Liliaceae.

Smilax bona-nox

Saw greenbrier, zarzaparrilla, catbrier, bullbrier, chinabrier, tramp's-trouble Smilaceae > The greenbrier family. Formerly in the Liliaceae.

Smilax walteri

Coral greenbrier, red-berried greenbrier, red-berried bamboo Smilaceae > The greenbrier family. Formerly in the Liliaceae.

Solanum

Common name: Nightshade

Solanum americanum

American black nightshade, glossy nightshade Solanaceae > The nightshade family.

Solanum carolinense

Carolina horsenettle Solanaceae > The nightshade family.

Solanum dulcamara

Bittersweet nightshade, bitter nightshade, blue bindweed, Amara Dulcis, climbing nightshade, fellenwort, felonwood, poisonberry, poisonflower, scarlet berry, snakeberry, trailing bittersweet, trailing nightshade, violet bloom, woody nightshade Solanaceae > The nightshade family.

Solanum elaeagnifolium

Silverleaf nightshade, silver-leaved nightshade, prairie berry, silverleaf nettle, white horsenettle, silver nightshade Solanaceae > The nightshade family.

Solanum lycopersicum

Tomato Solanaceae > The nightshade family.

Solanum nigrum

Black nightshade Solanaceae > The nightshade family.

Solanum physalifolium

Hairy nightshade, hoe nightshade, ground-cherry nightshade = Solanum sarrachoides Solanaceae > The nightshade family.

Solanum pseudocapsicum

Jerusalem cherry, capsicum weed, false capsicum, false Jerusalem cherry, Madeira cherry, Madeira winter-cherry, Madeira wintercherry, Natal-cherry, orange poison-berry, winter-cherry Solanaceae > The nightshade family.

Solanum ptycanthum

Eastern black nightshade Solanaceae > The nightshade family.

Solanum rostratum

Buffalo bur, buffalobur nightshade, spiny nightshade, Colorado bur, Kansas thistle, Mexican thistle, Texas thistle Solanaceae > The nightshade family.

Solanum triflorum

Cutleaf nightshade, small nightshade Solanaceae > The nightshade family.

Solanum tuberosum

Potato Solanaceae > The nightshade family.

Solanum umbelliferum

Bluewitch nightshade, blue witch, Solanaceae > The nightshade family.

Solanum unknown-species

This species was collected by Ruth Smith from a llama pasture in Bend, OR. Despite having been sent to several experts, its identity still remains unknown (likely a new record for North America). Solanum is a very large and complicated genus, particularly in South America (maybe introduced with the llamas?). Solanaceae > The nightshade family.

Solanum viarum

Tropical soda apple Solanaceae > The nightshade family.

Solidago canadensis

Canada goldenrod Asteraceae = Compositae > The sunflower family.

Solidago missouriensis

Missouri goldenrod Asteraceae = Compositae > The sunflower family.

Solidago rigida

Rigid goldenrod, stiff goldenrod Asteraceae = Compositae > The sunflower family.

Solidago tortifolia

Twist-leaf goldenrod, twisted-leaf goldenrod, leafy pineywoods goldenrod Asteraceae = Compositae > The sunflower family.

Soliva sessilis

Lawnweed, field burrweed, lawn burrweed, common soliva, Onehunga weed Asteraceae = Compositae > The sunflower family.

Sonchus arvensis

Perennial sowthistle Asteraceae = Compositae > The sunflower family.

Sonchus asper

Spiny sowthistle Asteraceae = Compositae > The sunflower family.

Sonchus oleraceus

Annual sowthistle Asteraceae = Compositae > The sunflower family.

Sophora japonica

Japanese pagoda tree = Styphnolobium japonicum Fabaceae = Leguminosae > The pea family.

Sorbus aucuparia

Rosaceae > The rose family.

Sorghastrum nutans

Yellow indiangrass Poaceae = Gramineae > The grass family.

Sorghum bicolor

Shattercane, Sudangrass Poaceae = Gramineae > The grass family.

Sorghum halepense

Johnsongrass, Johnson grass, Aleppo grass, Aleppo milletgrass Poaceae = Gramineae > The grass family.

Sparganium eurycarpum

Broadfruit bur-reed, giant bur-reed Typhaceae > The cattail family. Formerly in the Sparganiaceae.

Spartina pectinata

Prairie cordgrass, freshwater cordgrass, tall marshgrass, sloughgrass Poaceae = Gramineae > The grass family.

Spartium junceum

Spanish-broom, weaver's-broom Fabaceae = Leguminosae > The pea family.

Spergula arvensis

Corn spurry, field spurry, devil's-gut, pickpurse, sandweed Caryophyllaceae > The chickweed family.

Spergularia rubra

Red sandspurry Caryophyllaceae > The chickweed family.

Spergularia salina

Salt sandspurry Caryophyllaceae > The chickweed family.

Spermacoce verticillata

Shrubby false-buttonweed Rubiaceae > The madder family.

Sphaeralcea ambigua

Apricot mallow, desert hollyhock Malvaceae > The mallow family.

Sphaerophysa salsula

Swainsonpea, alkali swainsonpea, Austrian peaweed, red bladder-vetch Fabaceae = Leguminosae > The pea family.

Sphagneticola trilobata

Creeping-oxeye, Bay Biscayne creeping-oxeye Asteraceae = Compositae > The sunflower family.

Spiraea douglasii

Hardhack, hardhack steeplebush, Douglas'-spirea Rosaceae > The rose family.

Spiraea lucida

Shiny-leaf spirea, white spirea, spirea, white meadowsweet = Spiraea betulifolia ssp. lucida Rosaceae > The rose family.

Spiraea prunifolia

Bridal wreath spiraea, popcorn spiraea, shoe button spiraea Rosaceae > The rose family.

Spiraea pyramidata

Pyramid spiraea A hybrid between Spiraea douglasii and Spiraea betulifolia Rosaceae > The rose family.

Spiranthes romanzoffiana

Hooded Ladies' tresses Orchidaceae > The orchid family.

Spirodela polyrhiza

Common duckmeat, common duckweed, greater duckweed, duckmeat Araceae > The arum family. Formerly in the Lemnaceae.

Sporobolus cryptandrus

Sand dropseed Poaceae = Gramineae > The grass family.

Sporobolus domingensis

Coral dropseed Poaceae = Gramineae > The grass family.

Sporobolus indicus

Smut grass Poaceae = Gramineae > The grass family.

Stachys byzantina

Lamb's-ear, woolly hedgenettle, wooly betony Lamiaceae = Labiatae > The mint family.

Stachys cooleyae

Cooley's hedge-nettle Lamiaceae = Labiatae > The mint family.

Stachys floridana

Florida betony, Florida hedgenettle, rattlesnake weed Lamiaceae = Labiatae > The mint family.

Stachys mexicana

Mexican hedge-nettle Lamiaceae = Labiatae > The mint family.

Stachys palustris

Marsh woundwort, marsh hedge-nettle Lamiaceae = Labiatae > The mint family.

Stachytarpheta jamaicensis

Jamaica vervain, blue porterweed, blue snakeweed, bastard vervain, Brazilian tea, light-blue snakeweed Verbenaceae > The verbena family.

Stellaria media

Common chickweed, chickweed, nodding chickweed, chickenwort, bindweed, satin flower, stitchwort, tongue-grass, common starwort, starwort, craches, maruns, winterweed, white bird's-eye Caryophyllaceae > The chickweed family.

Stenaria nigricans

Diamond-flowers Rubiaceae > The madder family.

Stenotaphrum secundatum

St. Augustine grass Poaceae = Gramineae > The grass family.

Stephanomeria paniculata

Tufted wirelettuce, stiff-branched wirelettuce Asteraceae = Compositae > The sunflower family.

Stipa comata

Needle-and-thread Poaceae = Gramineae > The grass family.

Stylisma patens

Coastalplain dawnflower Convolvulaceae > The morningglory family.

Stylosanthes biflora

Pencil Flower, endbeak pencilflower, sidebeak pencilflower Fabaceae = Leguminosae > The pea family.

Suaeda linifolia

Pin-leaf seepweed Amaranthaceae > The amaranth family. Formerly in the Chenopodiaceae.

Symphoricarpos albus

Common snowberry Caprifoliaceae > The honeysuckle family.

Symphyotrichum divaricatum

Saltmarsh-aster, American lawn-aster, southern annual-saltmarsh-aster Asteraceae = Compositae > The sunflower family. = Aster divaricatus

Symphyotrichum ericoides

White heath-aster, white aster, heath-aster = Aster ericoides Asteraceae = Compositae > The sunflower family.

Symphyotrichum lateriflorum

Calico aster = Aster lateriflorum Asteraceae = Compositae > The sunflower family.

Symphyotrichum novae-angliae

New England aster = Aster novae-angliae Asteraceae = Compositae > The sunflower family.

Symphyotrichum pilosum

Frostweed aster, hairy white oldfield-aster, heath-aster, oldfield-aster, Pringle's aster = Aster pilosum Asteraceae = Compositae > The sunflower family.

Symphytum officinale

Common comfrey Boraginaceae > The borage family.

Syringa vulgaris

Common lilac Oleaceae > The olive family.

Taeniatherum caput-medusae

Medusahead Poaceae = Gramineae > The grass family.

Tamarix chinensis

Saltcedar, tamarisk = Tamarix ramosissima Tamaricaceae > The tamarix family.

Tamarix gallica

French tamarisk Tamaricaceae > The tamarix family.

Tamarix parviflora

Small-flowered tamarisk Tamaricaceae > The tamarix family.

Tanacetum balsamita

Costmary, alecost, balsam herb, bible leaf, mint geranium Chrysanthemum balsamita Asteraceae = Compositae > The sunflower family.

Tanacetum bipinnatum

Camphor tansy, dune tansy, Lake Huron tansy = Tanacetum camphoratum Asteraceae = Compositae > The sunflower family.

Tanacetum parthenium

Feverfew, featherfew, featherfoil, febrifuge plant = Chrysanthemum parthenium Asteraceae = Compositae > The sunflower family.

Tanacetum vulgare

Common tansy, tansy, golden-buttons, curly-leaf tansy Asteraceae = Compositae > The sunflower family.

Taraxacum laevigatum

Red-seeded dandelion = Taraxacum erythrospermum Asteraceae = Compositae > The sunflower family.

Taraxacum officinale

In most cases I have restricted myself to the English common names, but here I have compiled just a portion of those for this common species. Keep in mind that the scientific name is the same everywhere! pitachumki Bengali, hokouei-kon Chinese (translated), huang hua di ding Chinese (translated), pu gong ying Chinese (translated), pu kung ying Chinese (translated), maelkebotte Danish, blowball English, cankerwort English, clock flower English, common dandelion English, dandelion English, dumble-dor English, earth nail English, faceclock English, fairy clock English, fortune teller English, Irish daisy English, lion's teeth English, lion's-tooth English, milk-witch English, mok's head English, monks-head English, pee-a-bed English, pee-in-the-bed English, piss-a-bed English, pries, crown English, priest's-crown English, puff-ball English, swine's snout English, telltime English wet-a-bed English, white endive English, wild endive English, witch gowan English, witches milk English, yellow-gowan English, dent de lion French, pissenlit French, pissenlit vulgaire French, Löwenzahn German, Lowenzahnwurzel German, Wiesen-Löwenzahn German, dudhal Hindi, dudhi Hindi, dugchipheni Hindi, kanphul Hindi, karatu Hindi, shamuke Hindi, baran Hindi, Punjabi, milk gowan Irish, min-deul-rre Japanese, kaadu shaavanthi Kannada (Indian dialect), kadusevanti Kannada (Indian dialect), hand Kashmiri, seoyangmindeulle Korean (translated), dugddhapheni Maylayalam, dhudhal pharmaceutical, dente-de-leão Portugese, dudh-bhatthal Punjabi, radam Punjabi, shamu kei Punjabi, oduvančik lekarstvennyj Russian (translated), dugdhapheni Sanskrit, lootari Sanskrit, payasvini Sanskrit, achicoria amarga Spanish, amargón Spanish, diente de león Spanish, patri Teluga (Indian dialect) Asteraceae = Compositae > The sunflower family.

Tarenaya hassleriana

Spider-flower, spider-plant, pink-queen = Cleome hassleriana Cleomaceae > The spider-flower family. Formerly in the Capparidaceae.

Teucrium canadense

Lamiaceae = Labiatae > The mint family.

Thelypodium laciniatum

Cutleaf thelypody Brassicaceae = Cruciferae > The mustard family.

Thermopsis montana

Mountain goldenbanner, mountain thermopsis, false lupine, golden-pea, Fabaceae = Leguminosae > The pea family.

Thermopsis rhombifolia

Prairie thermopsis, golden bean Fabaceae = Leguminosae > The pea family.

Thinopyrum ponticum

Tall wheatgrass Poaceae = Gramineae > The grass family.

Thlaspi arvense

Pennycress, field pennycress, fanweed, stinkweed Brassicaceae = Cruciferae > The mustard family.

Thuja orientalis

Oriental arborvitae, Chinese arborvitae, biota, Oriental thuja = Platycladus orientalis Cupressaceae > The cedar family.

Thuja plicata

Western redcedar, Pacific redcedar, giant arborvitae, western arborvitae, giant cedar, shinglewood Cupressaceae > The cedar family.

Thymelaea passerina

Spurge flax Thymelaeaceae > The mezereon family.

Thymus praecox

Mother-of-thyme, creeping thyme wild thyme Lamiaceae = Labiatae > The mint family.

Thysanocarpus curvipes

Sand fringepod, lacepod, lacepod mustard Brassicaceae = Cruciferae > The mustard family.

Tillandsia usneoides

Spanish-moss, old-man's-beard, long-moss, black-moss Bromeliaceae > The bromeliad family.

Tonella floribunda

Manyflower tonella Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Torilis arvensis

Spreading hedge-parsley common hedge-parsley, field hedge-parsley Apiaceae = Umbelliferae > The parsley family.

Torilis nodosa

Knotted hedge-parsley Apiaceae = Umbelliferae > The parsley family.

Toxicodendron pubescens

Eastern poison-oak Anacardiaceae > The sumac family.

Toxicodendron radicans

Poison-oak, poison-ivy, eastern poison-ivy = Rhus radicans Anacardiaceae > The sumac family.

Toxicodendron rydbergii

Poison-oak, poison-ivy, western poison-oak Anacardiaceae > The sumac family.

Toxicoscordion elegans

Elegant death-camas Melanthiaceae > The bunchflower family. Formerly in the Liliaceae.

Toxicoscordion venenosum

Meadow death-camas Melanthiaceae > The bunchflower family. Formerly in the Liliaceae.

Tradescantia ohiensis

Ohio spiderwort, common spiderwort Agavaceae > The agave family. Formerly in the Commelinaceae.

Tragia ramosa

Branched noseburn, desert tragia Euphorbiaceae > The spurge family.

Tragopogon dubius

western salsify, yellow salsify, western goat's-beard, wild oysterplant, yellow goat's beard, goat's beard, common salsify, salsify Asteraceae = Compositae > The sunflower family.

Tragopogon floccosus

Wooly goat'sbeard The only known population in North America at Pullman, WA Asteraceae = Compositae > The sunflower family.

Tragopogon immature

It is very difficult to determine the species of Tragopogon when the plants are immature. Many people mistake them for grasses at this stage. Asteraceae = Compositae > The sunflower family.

Tragopogon mirus

Remarkable goat's-beard Asteraceae = Compositae > The sunflower family.

Tragopogon porrifolius

common salsify, goatsbeard, Jerusalem star, John-go-to-bed-at-noon, Joseph's flower, oyster plant, oysterplant, purple goat's beard, purple salsify, salsify, vegetable oyster, vegetable oyster plant, wild quinine, wild salsify Asteraceae = Compositae > The sunflower family.

Tragopogon pratensis

Meadow salsify, meadow goat'sbeard, yellow salsify, Jack-go-to-bed-at-noon = Tragopogon lamottei Asteraceae = Compositae > The sunflower family.

Tragopogon roots

Tragopogon porrifolius was originally introduced for its edible tap root which (supposedly) tastes like oysters. Asteraceae = Compositae > The sunflower family.

Tragopogon species-nova

This species was collected in Moscow Idaho in 2012. The flower heads are very large (3" diameter) and most uniquely it has slender rhizomes (all other Tragopogon species in North America are tap rooted biennials). Moscow is only eight miles from Pullman, WA where Dr. Marion Ownbey conducted extensive well published research on the genus Tragopogon. As a result of introductions for that research, there are species and hybrids that occur in the area that are found nowhere else in North America. This may be a species that he introduced, or yet another hybrid (it does not appear to produce fertile seed). To date, it remains unidentified. Asteraceae = Compositae > The sunflower family.

Tribulus cistoides

Punture-weed, goat's-head, Jamaican feverplant Zygophyllaceae > The creosote-bush family.

Tribulus terrestris

Puncturevine, Puncture Vine, Goat's Head, Goathead, Caltrop, Bullhead, Texas Sandbur, Mexican Sandbur Zygophyllaceae > The creosote-bush family.

Tridax procumbens

Coatbuttons, coat buttons, Mexican daisy, tridax, tridax daisy, wild daisy Asteraceae = Compositae > The sunflower family.

Trifolium arvense

Rabbit's-foot clover, hare's foot clover, old field clover, pussy clover, stone clover Fabaceae = Leguminosae > The pea family.

Trifolium aureum

Golden clover, large hop-trefoil, large trefoil, large hop-clover, hop-clover Fabaceae = Leguminosae > The pea family.

Trifolium campestre

Large hop clover, field clover, field hop-clover, hop clover, hop trefoil, lesser yellow trefoil, low clover, low hop clover, low hop trefoil, pinnate hop clover, smaller hop clover, yellow clover Fabaceae = Leguminosae > The pea family.

Trifolium dubium

Little hop-clover, cowhop clover, hop-clover, Irish shamrock, least hop-clover, lesser trefoil, lesser yellow trefoil, low hop clover, shamrock, shamrock clover, small hop clover, suckling clover, yellow clover, yellow shamrock, yellow suckling clover Fabaceae = Leguminosae > The pea family.

Trifolium fragiferum

strawberry clover, strawberry-headed clover Fabaceae = Leguminosae > The pea family.

Trifolium hybridum

Alsike clover A hybrid of Trifolium repens and Trifolium pratense Fabaceae = Leguminosae > The pea family.

Trifolium incarnatum

Crimson clover, Italian clover Fabaceae = Leguminosae > The pea family.

Trifolium pratense

Red clover, cleaver grass, cow clover, cow grass, cowgrass, mammoth red clover, marlgrass, meadow clover, meadow trefoil, medium red clover, peavine clover, purple clover Fabaceae = Leguminosae > The pea family.

Trifolium repens

white Dutch clover, Dutch clover, honeysuckle clover, ladino clover, white clover, Fabaceae = Leguminosae > The pea family.

Trifolium subterraneum

Subterranean clover, burrowing clover, sub-clover, Fabaceae = Leguminosae > The pea family.

Trifolium wormskoldii

Cow's-clover, coast clover, sand clover, seaside clover, springbank clover, Wormskjold's clover Photos provided by Dr. Joe DiTomaso, author of Weeds of California and Other Western States. Fabaceae = Leguminosae > The pea family.

Triglochin maritima

Sea arrowgrass Juncaginaceae > The arrowgrass family.

Trillium petiolatum

Idaho trillium, roundleaf trillium Trilliaceae > The trillium family. Formerly in the Liliaceae.

Triodanis perfoliata

Campanulaceae > The bellflower family.

Triphysaria pusilla

Dwarf owl's-clover Orobanchaceae > The broomrape family. Formerly in the Scrophulariaceae.

Tripleurospermum maritimum

Scentless mayweed, false mayweed, sea mayweed Asteraceae = Compositae > The sunflower family.

Tripsacum dactyloides

Gamma grass, fakahatchee grass Poaceae = Gramineae > The grass family.

Triticum aestivum

Wheat Poaceae = Gramineae > The grass family.

Trollius chinensis

Chinese globeflower Ranunculaceae > The buttercup family.

Tropaeolum majus

Garden nasturtium, Indian cress, monk's-cress Tropaeolaceae > The nasturtium family.

Tropaeolum peregrinum

Canary creeper, canarybird flower, canarybird vine, canary nasturtium Tropaeolaceae > The nasturtium family.

Tussilago farfara

Colt's-foot, coltsfoot Asteraceae = Compositae > The sunflower family.

Typha angustifolia

Narrowleaf cattail Typhaceae > The cattail family.

Typha domingensis

Southern cattail, cumbungi Typhaceae > The cattail family.

Typha latifolia

Broadleaf cattail Typhaceae > The cattail family.

Ulex europaeus

Gorse common gorse, whin, furze Fabaceae = Leguminosae > The pea family.

Ulmus pumila

Siberian elm Ulmaceae > The elm family.

Uniola paniculata

Sea-oats Really, this should be sea-oat, as "oat" is both the singular and plural form, as in "wheat". Poaceae = Gramineae > The grass family.

Urena lobata

Caesarweed, Caesar weed Malvaceae > The mallow family.

Urochloa mutica

Paragrass Poaceae = Gramineae > The grass family.

Urochloa subquadripara

Tropical signalgrass Poaceae = Gramineae > The grass family.

Urtica cannabina

I found the name Kentucky hemp associated with this plant, but it apparently does not occur anywhere in North America, much less Kentucky! These photos were taken at the Berlin Botanical Garden Urticaceae > The stinging-nettle family.

Urtica dioica

Stinging nettle Urticaceae > The stinging-nettle family.

Urtica urens

Burning nettle Urticaceae > The stinging-nettle family.

Utricularia foliosa

Leafy bladderwort Lentibulariaceae > The bladderwort family.

Utricularia macrorhiza

Greater bladderwort Lentibulariaceae > The bladderwort family.

Utricularia vulgaris

Bladderwort Lentibulariaceae > The bladderwort family.

Valerianella locusta

European corn salad, lambslettuce, Lewiston cornsalad Valerianaceae > The valerian family.

Vallisneria americana

American eelgrass Hydrocharitaceae > The tape-grass family.

Ventenata dubia

Ventenata, North-African-grass Poaceae = Gramineae > The grass family.

Veratrum californicum

California false-hellebore Liliaceae > The lily family.

Veratrum viride

Green false-hellebore, American false-hellebore Liliaceae > The lily family.

Verbascum X

Verbascum blattaria

Moth mullein Scrophulariaceae > The snapdragon family.

Verbascum thapsus

Flannel mullein, miner's candles, great mullein, common mullein Scrophulariaceae > The snapdragon family.

Verbena bonariensis

Purpletop vervain, clustertop vervain, Argentinian vervain Verbenaceae > The verbena family.

Verbena bracteata

Bracted vervain Verbenaceae > The verbena family.

Verbena brasilensis

Brazilian vervain Verbenaceae > The verbena family.

Verbena hastata

Swamp vervain, American blue verbena, simpler's joy Verbenaceae > The verbena family.

Verbena rigida

Sandpaper verbena, tuberous verbena, rigid verbena Verbenaceae > The verbena family.

Verbena stricta

Hoary vervain Verbenaceae > The verbena family.

Vernonia baldwinii

Western ironweed Asteraceae = Compositae > The sunflower family.

Vernonia gigantea

Giant ironweed Asteraceae = Compositae > The sunflower family.

Vernonia noveboracensis

New York ironweed Asteraceae = Compositae > The sunflower family.

Veronica americana

American brooklime Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Veronica anagallis-aquatica

Water speedwell, blue water-speedwell Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Veronica arvensis

Corn speedwell Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Veronica biloba

Two-lobed speedwell Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Veronica chamaedrys

Germander speedwell Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Veronica filiformis

Threadstalk speedwell Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Veronica hederaefolia

Ivy-leaf speedwell Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Veronica officinalis

Common speedwell, common gypsyweed Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Veronica peregrina

Neckweed, purslane speedwell Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Veronica persica

Persian speedwell, common field-speedwell, large field speedwell, bird's-eye, winter speedwell Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Veronica serpyllifolia

Thyme-leaf speedwell Plantaginaceae > The plantain family. Formerly in the Scrophulariaceae.

Viburnum opulus

European cranberrybush, highbush cranberry Adoxaceae > The muskroot family. Formerly in the Caprifoliaceae.

Vicia acutifolia

Fourleaf vetch Fabaceae = Leguminosae > The pea family.

Vicia americana

American vetch Fabaceae = Leguminosae > The pea family.

Vicia cracca

Tufted vetch, cow vetch, bird vetch, boreal vetch Fabaceae = Leguminosae > The pea family.

Vicia disperma

Two-seed vetch Fabaceae = Leguminosae > The pea family.

Vicia sativa

Tare, common vetch, spring vetch Fabaceae = Leguminosae > The pea family.

Vicia tetrasperma

Four-seed vetch Fabaceae = Leguminosae > The pea family.

Vicia villosa

Hairy vetch Fabaceae = Leguminosae > The pea family.

Vigna luteola

Deer pea, wild cow-pea, hairypod cow-pea Fabaceae = Leguminosae > The pea family.

Vinca major

Large periwinkle, greater periwinkle Apocynaceae > The dogbane family.

Vinca minor

Small periwinkle, lesser periwinkle Apocynaceae > The dogbane family.

Viola arvensis

European field pansy, field violet Violaceae > The violet family.

Viola bicolor

Field pansy Violaceae > The violet family.

Viola nuttallii

Yellow prairie-violet Violaceae > The violet family.

Viola odorata

Sweet blue-violet Violaceae > The violet family.

Viola sororia

Hooded blue-violet Violaceae > The violet family.

Viola tricolor

Pansy, common pansy Violaceae > The violet family.

Vitis cinerea

Gray-bark grape, Spanish grape Vitaceae > The grape family.

Vitis rotundifolia

Muscadine Vitaceae > The grape family.

Vulpia myuros

Rat-tail fescue = Festuca myuros Poaceae = Gramineae > The grass family.

WTF sp.

Found in the sand dunes along the Oregon coast and included here just to see if anyone is paying attention. If you know the answer, send me an email at: rold@pullman.com

Waltheria indica

Sleepy-morning Malvaceae > The mallow family.

Wyethia amplexicaulis

Northern mules-ears Asteraceae = Compositae > The sunflower family.

Xanthium strumarium

Cocklebur, common cocklebur Asteraceae = Compositae > The sunflower family.

Xanthoceras sorbifolia

Yellow-horn Sapindaceae > The soapberry family.

Youngia japonica

Oriental false-hawk's-beard Asteraceae = Compositae > The sunflower family.

Yucca glauca

Soapweed, soapweed yucca, small soapweed Agavaceae > The agave family. Formerly in the Liliaceae.

Zanthoxylum americanum

Common prickly-ash, northern prickly-ash, yellow-wood, toothache-tree, suterberry Rutaceae > The rue family.

Zea mays

Corn, maize Poaceae = Gramineae > The grass family.

Zeuxine strateumatica

Lawwn-orchid, soldier-orchid, soldier's-orchid Orchidaceae > The orchid family.

Zizania aquatica

Wild-rice, annual wild-rice Poaceae = Gramineae > The grass family.

Zizaniopsis miliacea

Giant cutgrass, southern wildrice, water millet Poaceae = Gramineae > The grass family.

Zizia aurea

Golden Alexanders Apiaceae = Umbelliferae > The parsley family.

Zygophyllum fabago

Syrian bean-caper Zygophyllaceae > The creosote-bush family.

Dr. Richard Old

I am a fifth generation resident of Whitman County in southeastern Washington, and self professed "weed nerd", with a particular fondness for the "channeled scablands". Through the years I have taught courses on ethnobotany, survival, plant identification, forensic botany and expert systems.

If you are visiting the site in an attempt to identify an unknown plant, and fail in doing so, Email Me an image and I will give it a try.

For those of you more interested in credentials than qualifications, see below.

BS, MS, Washington State University

Ph.D. Plant Science University of Idaho 1990

Weed Identification Specialist, Washington State University Cooperative Extension 1976 to present

Weed Identification Specialist, University of Idaho 1984 – 1992, and 2009 – present

Regional Reviewer, Flora of North America Project

Consultant on forensic botany to state and federal law enforcement agencies (including the Spokane Serial Killer case, aired on Forensic Factor, Season 5 Episode 5, Discovery Channel, spring 2009)

Owner and co-founder, XID Services, Inc., expert-system software for biological identifications. Used by Flora-ID-Northwest to create the largest interactive plant identification database in the world.

Former Scientific Adviser, Washington State Noxious Weed Control Board (Appointed by Governor)

Former Chair, Education Committee, Washington State Noxious Weed Control Board

Former President, Eastern Washington Native Plant Society

Former Vice-Chair, Whitman County Noxious Weed Control Board

Former President, Eastern Washington Weed Board Association

Former Member BLM Regional Advisory Committee (Appointed by Secretary of the Interior)

Former Member, National Weed Alert Committee, Weed Science Society of America

1991 – Idaho Weed Worker of the Year

1990 – Honorary lifetime member, Washington State Weed Association

1999 – XVI International Botanical Congress, St. Louis Missouri, United States Chairman, Session on Expert Identification Systems

2005 Washington State Weed Warrior, the highest award of the Washington State Weed Association

Author, 1,000 Weeds of North America, interactive identification guide on CD ROM

Author, 1,200 Weeds of the 48 States and Adjacent Canada, interactive identification guide on DVD

Author, 1,225 Weeds of the United States and Adjacent Canada, interactive identification guide on flash drive, the most comprehensive weed identification reference ever published.

Contributor, Flora of the Northeast, Magee and Ahles, 2007 (interactive CD ROM in book jacket)

Contributor, Grasses of the Northeast, Magee, 20014 (interactive CD ROM in book jacket)

Photographic Contributor, Field Guide to Wildflowers of North America, Brandenburg 2010

Contributing Author, Forensic Botany, Hall and Byrd 2012

Co-author, Forb Seedling Identification Guide for the Inland Northwest, Pavek, Erhardt, Heekin, and Old 2013

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