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Find by Color | Growth Stage | Comprehensive | West | Other U.S. Regions
Agricultural | Aquatic | Australia | Native | Poisonous
Find Weeds by Color
WeedsBC has a search by color feature.
The King County, Washington, Noxious Weed Control Program, includes weed photos grouped by color.
Identify by flower color from the Washington State Noxious Weed Control Board.
Identify Different Growth Stages
Common Weeds Good photos of various life stages of common Western weeds, from Colorado State University.
Grow Native! Plant Identification for Prairie Plantings. From the Missouri Dept. of Conservation. Photos of seeds, seedlngs, juvenile, and mature plants, and distinguishing characteristics.
Purdue Fruit and Vegetable Connection Scroll down to "Weed Identification" for links to many keys with photos, photos of weeds in various growth stages, weed keys with photos, weed seedling identification, and much more.
Weed Management in Nursery Crops, from Dr. James Altland, Oregon State U. Guide to field weeds and weeds of container crops; excellent photos of all stages as well as control info.
Weeds of the West— Not an online image gallery, but one of the best printed collections of weed images. A full-color, easy-to-use guide with over 900 color photographs showing the early growth stages, mature plants and features for positive identification of each weed discussed. Includes descriptions, habitats and characteristics of important weed species in the Western United States. Written by seven Extension Specialists and published by the Western Society of Weed Science. Widely available.
WeedSpotter from Bayer Crop Science, UK. Photos and line drawings of both seedlings and mature weeds. Many North American weeds are pictured.
Comprehensive Sites
Botanical Image Data Bases hosted by Southern Illinois University. A directory of image databases organized by region (worldwide and US), plant type, plant use, and more.
CIPM Image Gallery. Over 1200 images in native and nonnative categories.
Digital Flora of Texas — searchable database for a vast collection of floral photographs and botanical drawings. A tremendous resource.
Image archive from The Nature Conservancy Invasives on the Web.
Invasive and Exotic Species of North America from invasive.org.
Lady Bird Johnson Wildflower Center Image Gallery. Native wildflowers across the U.S. Updated in 2007 to include 18,743 plant images.
Google Image Search, searches 880,000,000 images.
Western States and Provinces
Alberta Invasive Plants. All the fact sheets on the Managing Invasives page have good photos.
Arizona Flora and Fauna Image Gallery from Arizona Cooperative Extension. Includes crops, weeds, horticultural plants, and native and naturalized plants.
California Encycloweedia Notes on Identification, Biology, and Management of Plants Defined as Noxious Weeds by California Law.Links to Noxious Weed Photographic Gallery among many other resources.
The University of California Integrated Pest Management Weed Photo Gallery includes many weed species commonly found in California farms and landscapes.
CalPhotos Plants — accesses 46,679 images of plants as part of the UC-Berkeley Digital Library Project.
Common Weeds Good photos of various life stages of common Western weeds, from Colorado State University.
Idaho Weed Awareness Virtual Field Guide. Image galleries and videos of the 36 plants on Idaho's noxious weed list, plus panoramas and videos of Idaho weed regions.
Photo Library of plants common across the North American West, from Utah State University Extension Weed Web.
A Photo Gallery of Washington's Noxious Weeds
Plants of Washington from University of Washington Herbarium. Includes invasives.
Weed Images and descriptions from Weeds BC.
Weed Image Gallery from Manitoba Agriculture.
Weeds of the West— Not an online image gallery, but one of the best printed collections of weed images. Over 900 color photographs showing early growth stages, mature plants and features for positive identification of each weed discussed. Includes descriptions, habitats and characteristics of important weed species in the Western United States. Written by seven Extension Specialists and published by the Western Society of Weed Science. Widely available.
Other U.S. Regions
The Bioimages site from Vanderbilt University includes images of southeastern plants and identifying characteristics of some invasive plants
The Bugwood Network from the University of Georgia—invasive plant information and images, primarily for the southeastern U.S.
Grow Native! Plant Identification for Prairie Plantings. From the Missouri Dept. of Conservation. Photos of seeds, seedlngs, juvenile, and mature plants, and distinguishing characteristics.
Florida Flora Picture Gallery Photos of native, naturalized, or species commonly encountered in the wild in Florida.
Mid-Atlantic Exotic Plant Pest Council Plant List —The University of Georgia Bugwood Network has taken the Alien Plant Working Group's regional invasive plant list and made an image gallery for it. Click on plant names for images
Noble Foundation Plant Image Gallery (Ardmore, Oklahoma). Currently includes images of over 600 species of vascular plants, most in the NE Texas-W Oklahoma region, although some occur as far south as the Texas Gulf Coast and as far north as the Great Plains of Kansas and Nebraska, and many are common from New Mexico and Colorado to Arkansas and Missouri.
Plants of Hawaii Extensive list from Hawaiian Ecosystems at Risk project (HEAR)
Purdue Fruit and Vegetable Connection Scroll down to "Weed Identification" for links to weed photos for the Midwest, North Central states, and many others.
South Texas Natives Photos of grasses, forbs, and shrubs. A unit of the Caesar Kleberg Wildlife Research Institute of Texas A&M University-Kingsville
Southwest Exotic Plant Information Clearinghouse (SWEPIC) provides a color photo for each of 300+ southwestern exotic species.
Agricultural
IPM Images—The Source for Agricultural Images. A joint project of the University of Georgia and the NSF Center for Integrated Pest Management.
USDA/ARS Image Gallery Search for invasive plant images, biocontrol insects, and many more agricultural subjects
N.J. Agricultural Weed Gallery — photos and descriptions of agricultural weeds found in New Jersey; includes many found in the western U.S. as well.
Purdue Fruit and Vegetable Connection Scroll down to "Weed Identification" for links to many keys with photos, photos of weeds in various growth stages, weed keys with photos, weed seedling identification, and much more.
Weed Management in Nursery Crops, from Dr. James Altland, Oregon State U. Guide to field weeds and weeds of container crops; excellent photos of all stages as well as control info.
WeedSpotter from Bayer Crop Science, UK. Photos and line drawings of both seedlings and mature weeds. Many North American weeds are pictured.
Aquatic
University of Florida Aquatic, Wetland and Invasive Plant Information Retrieval System — photographs and line drawings, searchable by common name, scientific name, plant type category.
Non-Native Aquatic Plants — photos, identification, management, from Washington Dept. of Ecology.
Australia
Australia page from The Nature Conservancy includes photo gallery and inks to Australian weeds and resources.
CRC for Australian Weed Management image gallery highlights severity of the problem--excellent landscape photos include garden escapees such as Agapanthus, freesia, and forget-me-not.
North West Weeds Noxious weed control unit for the Shires of Gwydir and Inverell (NSW, Australia). Photos of declared noxious weeds and "non-declared" and native weeds. Includes a gallery of prickly pear photos documenting the history of Australia's worst nvasive plant.
Weeds Australia Weed Identification Tool includes photos.
Western Weeds: A guide to the weeds of Western Australia. The first edition is available online; the second editon (2007) is available in print. Under Plant Desriptions, click on "A to Z index," or links to plant type for images, illustrations, and description.
Native
Native Plant Information Network from Ladybird Johnson Wildflower Center
Native Plant Images from around the world. From BUBL LINK / 5:15, a catalogue of selected Internet resources covering all academic subject areas.
Also see our info by state page for links to the native plant societies in western states and provinces.
Poisonous
Cornell University Poisonous Plants Informational Database— a growing reference that includes plant images, pictures of affected animals and information on the botany, chemistry, toxicology, diagnosis and prevention of poisoning of animals by plants and other natural flora. Search by botanical or common name, type of toxin, animals affected.
Giftpflanzen Compendium — site in German. Includes chemical structures of toxins.
- Click on "Mit thematischen Pflanzenverzeichnissen" at top of page.
- Scroll up to "Liste sortiert nach botanischen Pflanzennamen," and click on the link.
- Choose a plant by botanical name.
- The resulting page includes a photograph and a diagram of the chemical structure of the toxin, as well as additional information in German.
