[1]
P. . Adanick and M. E. . Medley, “Opuntia humifusa sensu stricto (Cactaceae): New to Kentucky (U.S.A.) and confirmed in the Unglaciated Appalachian Plateaus”, J. Bot. Res. Inst. Texas, vol. 14, no. 1, pp. 141–146, Jul. 2020.