Xerophyte

Habit

It is a solitary (never clustered) barrel shaped cactus.

Central Spines

4-8,30-50 mm long.

Roots

Fibrous, produced from short tuberous root.

Flowers

Borne on older areoles at the woolly top of the plant, campanulate, cream coloured or reddish, 2,5-4 cm long, 2.2-3 cm in diameter; pericarpels and floral tubes covered by white wool and with stiff bristles.

Spines

Numerous, thick, curved upwards, dull ivory to horn coloured, becoming grey.

Ribs

18-35, obtuse, strongly notched to form tubercles.

Stem

Globose to shortly columnar with time, 12-32 cm in diameter, with stem apex covered by white wool.

Radial Spines

12-15,20-30 mm long.