The University of California, Irvine Herbarium (IRVC) was established in 1965, and is one of seven herbaria within the University of California campuses. IRVC holds ca. 35,000 vascular plant collections from the western United States, especially southern California and Orange County, and Baja California, Mexico. Many of the specimens collected by R.H. Whittaker are curated at IRVC. Approximately 86% of the collections are from California. IRVC is a member of the Consortium of California Herbaria (http://ucjeps.berkeley.edu/consortium/) and is a participant in the Consortium’s Digital Herbarium project, through which collections and locality data are entered into an electronic database easily accessible to the public. IRVC is part of the University of California, Irvine Arboretum. Contact: Dr. Peter A. Bowler, UCI Arboretum Director, University of California, Irvine Arboretum, Irvine, California 92697-1450. Email: firstname.lastname@example.org; (949) 824-5833.