The University of California’s Sweeney Granite Mountains Desert Research Center Herbarium (GMDRC) houses 14,000 vascular plant specimens, available to researchers and visiting classes at the GMDRC. This regional herbarium holds specimens from the western U.S. with a primary focus on the transmontane bioregions of California, Nevada, Arizona and Utah. Our collection is fully databased (Filemaker Pro) and a digital imaging project is ongoing.