Collections at Rancho Santa Ana Botanic Garden

Herbarium - The combined Herbarium of Rancho Santa Ana Botanic Garden and Pomona College ("RSA-POM") is about the tenth largest in the U.S. and the third largest in the western U.S., with current holdings totaling over 1,000,000 specimens.

Library - The Research Library contains approximately 48,000 volumes and 750 current journals and periodicals. Acquisitions increase yearly and include bound journals and periodicals.

Living Collection - The Living Collection contributes to the research and conservation mission of the Garden. Through public horticulture, the Living Collection also promotes the thoughtful utilization of our natural heritage. The Living Collection covers 86 acres housing over 2500 accessions of plants native to California and Baja. Those accessions represent 1400 taxa, different kinds of plants, including 900 species.

Seed Program - The primary function of RSABG's Seed Program is the curation and management of the Garden's extensive seed collection. The collection is comprised of over 3,000 accessions representing more than 1,600 California native plant species and cultivars.