California Botanic Garden Herbarium (RSA)

The combined Herbarium of California Botanic Garden (RSA) and Pomona College (POM) is a museum-quality collection of vascular plant and bryophyte specimens. With current holdings totaling over 1,250,000 specimens, the Herbarium is the third largest in California. The Herbarium is recognized throughout the world for its strength in documenting the diversity, distribution, variation, and ecology of more than 6,500 species of flowering plants, conifers, and ferns in California, which constitutes nearly 50% of the total collection. The holdings from Southern California exceed 250,000 and are unsurpassed by any other herbarium. Approximately 95% of the collection is composed of mounted sheets and filed according to a standardized system of classification. Ancillary collections that augment the collection include a cone & fruit collection, wood collection, fluid preserved collection, and pollen and anatomy slide collection.

Administrative Curator: Mare Nazaire,
Collection Type: Preserved Specimens
Management: Data snapshot of local collection database
Last Update: 4 December 2023
Digital Metadata: EML File
Collection Statistics
  • 13,051 specimen records
  • 1,139 (9%) georeferenced
  • 12,335 (95%) with images (12,369 total images)
  • 1,721 (13%) identified to species
  • 249 families
  • 413 genera
  • 492 species
  • 496 total taxa (including subsp. and var.)
Extra Statistics