The Vascular Plant Type Specimens in the Robert Bebb Herbarium of the University of Oklahoma

Abstract

The Robert Bebb Herbarium contains over 210,000 specimens and is a repository for 213 vascular plant type specimens.
Type specimens deposited at OKL represent 100 genera in 43 families and comprise 15 holotypes, 195 isotypes, and 3 isolectotypes. Types have been collected in 21 states of the U.S.A., whereas 13 types are from localities in four other North American countries. States with the greatest number of type specimens in decreasing order are Nevada, Oklahoma, Utah, California, Idaho, and Texas. Families with the largest number of type specimens include the Asteraceae, Polygonaceae, Brassicaceae, Fabaceae, and Scrophulariaceae; genera with the most type specimens include Eriogonum, Penstemon, Astragalus, and Erigeron. The Robert Bebb Herbarium has type specimens from the historically significant collections of B. F. Bush, A. W. Chapman, A. H. Curtiss, E. L. Greene, F. J. Lindheimer, and H. N. Patterson; collectors with the greatest number of type specimens include J. L. Reveal, I. W. Clokey, N. H. Holmgren, U. T. Waterfall, and G. J. Goodman. A list of type specimens is presented for the first time; a searchable list of type specimens at OKL will be made available at the web page of the Robert Bebb Herbarium.