The CCBER botanical collections include over 250,000 taxa of terrestrial and marine species. The vascular plant herbarium includes approximately 100,000 vascular plant specimens, lichens, and the C.H. Muller Oak Collection. The algal herbarium houses approximately 8000 specimens dating from the 1880s. Other notable collections include the Vernon I. Cheadle and Katherine Esau Botanical Collections and the Albert L. Brigger and Robert W. Holmes Diatom Collection.