Echinocereus mamillatus

Echinocereus mamillatus is a species of Echinocereus.

Background
Cespitose; stems ascending, 2 to 3 dm. long, cylindric, 3.5 to 6 cm. in diameter; ribs 20 to 25, sometimes oblique, strongly tuberculate; spines white or pinkish; radial spines 10 to 25, acicular, 3 to 12 mm. long; central spines 3 or 4, much stouter than some radials, 1 to 2.5 cm. long; flowers and fruit unknown.