Opuntia echios Howell in Proc. Calif. Acad. Sci., ser. 4, 21: 49. 1933 Opuntia echios Howell in Proc. Calif. Acad. Sci., ser. 4, 21: 49. 1933Taxon for this nameOpuntia echios Howell in Proc. Calif. Acad. Sci., ser. 4, 21: 49. 1933
