Opuntia geometrica A.Cast. in Kakteenkunde 1934: 172. 1934
Opuntia geometrica in Kakteenkunde 1934: 172. 1934
is basionym for Tephrocactus geometricus, Kaktus-ABC: 111. 1936 ["1935"]
is basionym for Tephrocactus alexanderi subsp. geometricus in Cactology 5 (Suppl. III): 2. 2016