Xerophyte

Central Spines

1 curved upwards, at first black-bluish that becomes greyish-white with darker tip 7-20mm long. Flowers

Seeds

Black.

Description

Usually solitary cactus almost completely concealed by spines and wool.

Tubercles

Conical, well-developed, 3-8mm high.

Ribs

15-15 tubercled.

Stem

Globular depressed, 40-160 mm high, 70-200 mm wide, yellowish-green with a very woolly apex.

Fruits

Dry, dehising from a lateral fissure.

Areoles

Oblong, at first very woolly then almost naked.