Rancho Santa Ana Botanic Garden Herbarium (RSA)

The combined Herbarium of Rancho Santa Ana Botanic Garden (RSA) and Pomona College (POM) is a museum-quality collection of vascular plant and bryophyte specimens. With current holdings totaling over 1,230,000 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.
Contact: Mare Nazaire, Administrative Curator (mnazaire@rsabg.org)
Collection Type: Preserved Specimens
Management: Data snapshot of local collection database
Last Update: 25 June 2019
IPT / DwC-A Source:
Digital Metadata: EML File
Rancho Santa Ana Botanic Garden Herbarium
1500 North College Avenue
Claremont, CA   91711-3157
(909) 625-8767 ext. 248, 268
Collection Statistics
  • 527,286 specimen records
  • 148,540 (28%) georeferenced
  • 21,452 (4%) with images
  • 504,664 (96%) identified to species
  • 350 families
  • 2,985 genera
  • 16,842 species
  • 18,995 total taxa (including subsp. and var.)
Extra Statistics