USDA. Agricultural Research Service.
Image Gallery is provided as a complimentary source of high-quality digital photographs available from the USDA's Agricultural Research Service, Office of Communications.
Connecticut Invasive Plant Working Group.
Florida Department of Agriculture and Consumer Services. Plant Industry.
USDA. APHIS. PPQ. CPHST. Identification Technology Program.
Each tool (Citrus ID, Citrus Diseases, Citrus Pests) includes a comprehensive image gallery with filtering capabilities.
Published by: University of Georgia. Bugwood Network; USDA. Forest Service.
Archive from the Nature Conservancy, Global Invasive Species Team.
Secretariat of the Convention on Biological Diversity.
Wisconsin Department of Natural Resources.
Alberta Invasive Species Council (Canada); Flickr.
Contains common invasive plant species found in Alberta and Western Canada.
University of Georgia. Center for Invasive Species and Ecosystem Health.
King County Department of Natural Resources (Washington). Water and Land Resources Division.
Rutgers Cooperative Research and Extension. New Jersey Agricultural Experiment Station.
A collection of photos and descriptions of agricultural weeds found in New Jersey.
Great Britain Non-Native Species Secretariat.
Australian Plant Biosecurity Cooperative Research Centre. Pests and Diseases Image Library.
Provides high quality images and information tools designed for biosecurity and biodiversity.
USDA. NRCS. National Plant Data Center.
South Dakota Game, Fish and Parks.
University of California. Statewide Integrated Pest Management Program.
The UC IPM Weed Photo Gallery includes many, but not all, weed species commonly found in California farms and landscapes.