The University of Florida Lichen Collection contains approximately 40,000 lichen specimens. The lichen collection is primarily from Florida but also contains numerous specimens from elsewhere. Important collections include those of William W. Calkins, Dana G. Griffin, III, Severin Rapp, and Roger L. Rosentreter. The FLAS acronym is the standard international abbreviation for the University of Florida Herbarium. It is derived from the herbarium's early association with the Florida Agricultural Experiment Station.