Original Description:The Cactaceae 4
p.160 - Britton & Rose (1920)
Cespitose, globose, 5 cm in diameter, bright green; tubercles in 13 rows, 4 to 5 mm high; radial spines 30 or more, at right angles to the tubercles; central spines 4 to 6, reddish brown, darker toward the tips, one of them strongly hooked; axils naked; flowers pinkish to purplish, delicately fragrant, 1 cm broad when fully expanded; outer segments ovate-oblong, acute or obtuse, with a more or less serrulate margin; inner perianth-segments oblong, obtuse; filaments pinkish; stigma-lobes 3 or 4, white; fruit white, 8 mm long; seeds black.
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