Echinomastus unguispinus var. laui (G.Frank & Zecher) Glass & R.A.Foster in Cact. Succ. J. (Los Angeles) 51: 124. 1979
Echinomastus unguispinus var. laui in Cact. Succ. J. (Los Angeles) 51: 124. 1979
is new combination for Echinomastus laui in Cact. Succ. J. (Los Angeles) 50: 188. 1978