Subspecies, varieties, forms and cultivars of plants belonging to the Escobaria orcuttii group
Escobaria orcuttiiRose ex Orcutt: (var.orcuttii) has 15-18 central spines to 11 mmlong, 30-41 radials, and flowers to 1,2 cm in diameter. Distribution: Arizona and southwestern New Mexico.
Escobaria orcuttii var. koenigiiCastetter, P.Pierce & K.H.Schwer.: has as many as 22 central spines up to 22 mm long, as many as 57 radials, and flowers to 2 cm in diameter. Distribution: Endemic to Luna County, New Mexico.
Escobaria orcuttii var. macraxinaCastetter, P.Pierce & K.H.Schwer.: has a stem diameter to 9 cm in diameter, as many as 22 central spines, and as many as 52 radials up to 25 mm long. Distribution: southeastern Hidalgo County, New Mexico.