| 1 (16) | United States Department of Agriculture | USA |  |
| 2 (22) | United States Geological Survey | USA | |
| 3 (56) | National Center for Biotechnology Information | USA | |
| 4 (59) | Smithsonian Institution * | USA | |
| 5 (111) | National Oceanic and Atmospheric Administration | USA | |
| 6 (175) | Lawrence Livermore National Laboratory * | USA | |
| 7 (183) | Lawrence Berkeley National Laboratory * | USA | |
| 8 (190) | National Center for Atmospheric Research | USA | |
| 9 (196) | Smithsonian National Museum of Natural History | USA | |
| 10 (199) | US Naval Research Laboratory | USA | |
| 11 (236) | Doe Joint Genome Institute | USA | |
| 12 (389) | Pacific Northwest National Laboratory | USA | |
| 13 (415) | U.S. Department of Energy * | USA | |
| 14 (416) | American Museum of Natural History | USA | |
| 15 (441) | Jet Propulsion Laboratory | USA | |
| 16 (466) | National Aeronautics and Space Administration * | USA | |
| 17 (479) | Oak Ridge National Laboratory | USA | |
| 18 (539) | Smithsonian Conservation Biology Institute | USA | |
| 19 (640) | United States Fish and Wildlife Service | USA | |
| 20 (713) | Field Museum Natural History | USA | |
| 21 (728) | US Environmental Protection Agency | USA | |
| 22 (778) | NASA Goddard Space Flight Center | USA | |
| 23 (912) | U.S. Army * | USA | |
| 24 (970) | Missouri Botanical Garden | USA | |
| 25 (1003) | Los Alamos National Laboratory * | USA | |
| 26 (1019) | Smithsonian Environmental Research Center | USA | |
| 27 (1133) | US National Science Foundation * | USA | |
| 28 (1372) | NASA Ames Research Center | USA | |
| 29 (1379) | University of Maryland, Center for Environmental Science | USA | |
| 30 (1484) | US Food and Drug Administration | USA | |
| 31 (1509) | Oak Ridge Institute for Science and Education | USA | |
| 32 (1738) | New York Botanical Garden | USA | |
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