Regional California Flora Database Colorado College Herbarium Colorado Native Plant Society Colorado Natural Areas Program Colorado Natural Heritage Program Colorado Rare Plant Field Guide - CNHP Colorado State University Herbarium Mountain-Plains Museums Association Native Plant Revegetation Guide for Colorado - CNAP Southern Rockies Ecosystem Project University of California at Berkeley Herbarium & Jepson Herbarium University of Kansas - R. L. McGregor Herbarium University of New Mexico Herbarium University of Northern Colorado Herbarium University of Wyoming - Rocky Mountain Herbarium Vascular Flora of the Southern Rocky Mountain Region National American Bryological and Lichenological Society American Fern Society American Museum of Natural History - Center for Biodiversity and Conservation American Society of Plant Taxonomists Botanical Society of America Center for Plant Conservation Harvard University Herbaria Missouri Botanical Garden National Science Foundation New York Botanical Garden Smithsonian: U.S. National Herbarium USDA Animal and Plant Health Inspection Service USDA PLANTS National Database Other Resources Biodiversity and Biological Collections Web Server Botanic Gardens Conservation International Celebrating Wildflowers Dictionary of Botanical Epithets Hunt Institute for Botanical Documentation Index Herbariorum International Code of Botanical Nomenclature International Plant Names Index List of lichenological societies National Biological Information Infrastructure Natural Science Collections Alliance (formerly: Association of Systematics Collections) NatureServe Recent Literature on Lichens Royal Botanic Garden Edinburgh Royal Botanic Gardens, Kew Royal Botanic Gardens Sydney Scott's Botanical Links