Xerophyte

Habit

Plants usually solitary but at times forming small clumps.

Central Spines

4 to 10, 7-10 mm long straight or or one somewhat bent or hooked at apex hooked , brownish, orange, sometimes one golden.

Seeds

Helmet-shaped, About 1 mm, broad, black, strongly tuberculate.

Flowers

Medium size, 26-40 mm long, 35-40 mm wide, golden yellow. Tube with brown wool and a few bristles.

Spines

Brownish, orange, yellow and white later grey, interlaced with those of adjacent ribs, often forming a brush-like bundle around the stem apex.

Ribs

15-29 more or less vertical. Tuberculate.

Stem

Globose to short cylindrical, to 8 cm or more across, dark green to olive-brownish.

Radial Spines

Up to 22, bristle-like, spreading, glassy-white to yellow, to 8 mm long.

Fruits

Fruit 8-10 mm broad, covered in wool.

Areoles

Up to 25 mm apart, but usually more closely set.