Opuntia echios var. zacana (J.T.Howell) E.F.Anderson & Walk. in Madroño 20: 256. 1970
Opuntia echios var. zacana in Madroño 20: 256. 1970
is new combination for Opuntia zacana in Proc. Calif. Acad. Sci., ser. 4, 21: 48. 1933
Opuntia echios var. zacana in Madroño 20: 256. 1970