Botanical Research Institute of Texas (BRIT)
Early Detection Distribution Mapping System (EDDMapS)
Invasive Plant Atlas of the United States/EDDMapS
Native Wildflower Seeds and Plants Nursery (Ion Exchange, Inc.)
New England Botanical Club (NEBC)
New England Wild Flower Society
Smithsonian Institution, National Museum of Natural History
The H. John Heinz III Center for Science, Economics and the Environment
United States Botanic Garden (USBG)
University of Arkansas, UARK Herbarium
University of California at Berkeley Jepson Online Interchange California Floristics
U.S. Army Corps of Engineers Cold Regions Research and Engineering
U.S. Bureau of Land Management (BLM)
U.S. Bureau of Reclamation
U.S. Dept. of Agriculture Animal and Plant Health Inspection Service (APHIS)
U.S. Dept. of Agriculture Forest Service
U.S. Dept. of Agriculture Forest Service, Southern Research Station
U.S. Dept. of Agriculture Natural Resource Conservation Service (NRCS)
U.S. Dept. of Defense Partners in Flight Program
U.S. Dept. of Interior Fish and Wildlife Service
U.S. Dept. of Interior National Park Service
U.S. Dept. of Interior National Park Service, Denali National Park and Preserve
U.S. Dept. of Transportation Federal Highway Administration
U.S. Environmental Protection Agency
West Virginia Natural Heritage Program