Opuntia floccosa var. crassior (Backeb.) G.D.Rowley in Natl. Cact. Succ. J. 13(1): 5. 1958
Opuntia floccosa var. crassior in Natl. Cact. Succ. J. 13(1): 5. 1958
is new combination for Tephrocactus floccosus var. crassior in Sitzungsber. Heidelberger Akad. Wiss., Math.-Naturwiss. Kl.: 203. 1958