The Angiosperm Phylogeny Group Web Site
Detailed information about the relationships among and within plant families.
California Plant Names: Latin and Greek Meanings and Derivations, A Dictionary of Botanical Etymology
Information about the derivation and meaning of hundreds of California native plant genus and species names complied by Michael L. Charters from published and online sources.
Nonprofit, online digital library providing information about California plant biodiversity for use in education, research, and conservation.
California Academy of Sciences Herbarium
Largest collection of vascular plants in the western US, with an informal agreement to avoid duplication of specimens at the UC and Jepson Herbaria.
California Botanical Society
Educational organization focused on the California flora; publishes the journal Madroño, holds monthly public meetings at UC Berkeley during the academic year, and sponsors annual or biennial graduate student meetings.
The California Chaparral Institute
Association of scientists, naturalists, and educators working to promote an understanding and respect for the California chaparral.
California Department of Fish and Game Habitat Conservation Branch
State agency operating programs focused on conservation and preservation of habitats and species in California.
California Natural Diversity Database—Plants
Inventory of the status and locations of rare plants in California created and maintained under the auspices of the California Department of Fish and Game.
California Vernal Pools
Provides information and resources on vernal pools and associated plants in California.
Carl W. Sharsmith Herbarium, San Jose State University
Collection of 15,000 pressed specimens of California native plants in a searchable onlne database.
Ceanothus Classification: Dr. Cliff Schmidt’s Treatment
The web's only complete treatment of the genus Ceanothus, created and maintained by Dr. Clifford Schmidt, Emeritus Professor of Biology at San Jose State University.
Flora of North America
Ongoing project compiling information on the names, taxonomic relationships, continent-wide distributions, and morphological characteristics of all vascular plants and bryophytes native and naturalized in North America north of Mexico.
Index to Botanical Literature
Searchable online index of botanical literature since 1996 dealing with various aspects of extant and fossil American plants and fungi, including systematics and floristics, morphology, and ecology, as well as economic botany and general botany.
Internet Directory for Botany
Extensive, searchable index to botanical information available on the Internet.
Houses a collection of 96,000 pressed specimens of California vascular plants; undertakes systematic, floristic, and conservation biology studies; communicates knowledge of the flora through publications and educational programs.
Jepson Online Interchange for California Floristics
Searchable online database provides the latest information on identification, taxonomy, distribution, ecology, relationships, and diversity of California vascular plants.
Scott’s Botanical Links
Extensive, searchable compilation of botany education websites created by botany professor Dr. Scott Russell.
Natural Resources DataBase
Searchable database of observations of flora and fauna made at open space and nature preserves in the greater San Francisco Bay Area.
Tree of Life Web Project
Collaborative effort of biologists from around the world providing information about the diversity of organisms on Earth, their evolutionary history (phylogeny), and characteristics.
UC Davis Herbarium
Houses a collection of 250,000 specimens of algae, lichens, bryophytes, ferns, gymnosperms, and angiosperms, with renowned collections of California weeds and vernal pool plants, grasses, oaks, and Euphorbiaceae.