Chusquea riosaltensis L.G. Clark isotype collected in Brazil by L. Clark and M. Morel, 1992 Liatris aspera Michx. collected in Lee County, Iowa by Tom & Diane Lammers, 1977 Polypodium virginianum L. collected by C.E. Bessey in Boone County, Iowa, 1871 Prunus virginiana L. collected in Story County, Iowa by George W. Carver, 1894 or 1895 Gossypium herbaceum L. collected in the Bessey Hall Greenhouse by J.F. Wendel and T.D. Couch, 1988.