Stem: Cylindrical, dark blue-green 7-30(-50) cm. long (2,5)6-7(-10) cm. in diameter, almost hidden under a dense covering of spines;
Tubercles: Very short, ovate conical, four-sided basally, 2 to 3 mm long; axils of tubercles setose but usually lacking bristles. Usually without latex.
Spines: Thin, needle-like, usually weak, hardly pungent, but variable.
Radial spines: 20 to 26, straight, whitish, white to dirty white to yellow to deep reddish brown, 4-6(-10) mm long.
Central spines: 4 to 15, bristle-like, 1-1,5(-2) cm long, reddish or pinkish brown, or yellowish, stouter than the radials.
Flowers: Flowers from the upper part of the plant in a ring shape around the apex, purplish or deep-pink, 12-20 mm long, 15 mm in diameter; inner perianth-segments acute; filaments much shorter than the perianth-segments, purple. Self fertile.
Blooming season: Spring
Fruit: Club shaped up to 20 mm long, greenish to dull purple.
Seeds: Reddish brown.