Opuntia engelmannii subsp. occidentalis Engelm. in Proc. Amer. Acad. Arts 3: 291. 1856
Opuntia engelmannii subsp. occidentalis in Proc. Amer. Acad. Arts 3: 291. 1856
is basionym for Opuntia engelmannii f. occidentalis, Handb. Kakteenkult.: 52. 1907
Opuntia engelmannii subsp. occidentalis in Proc. Amer. Acad. Arts 3: 291. 1856
Taxon for this name