Xerophyte

Central Spines

Usually absent but sometime 1 of the same colour and size of the radials.

Seeds

Dull-Black, kidney shaped, 1-1.2 mm long.

Description

Usually solitary occasionally very clustering, globose to slightly cylindrical cactus

Roots

Swollen bundled.

Tubercles

Loosely ordered, angular, conical-pyramidal , younger with steeper lateral surfaces, the older somewhat flattened out, rising from a wide hexagonal base, 3-6 mm long;

Flowers

Creamy-white with darker midribs, from the apical wool, individually or few, funnel-shaped; 18-20 mm long, 20-25 mm in diameter. The perianth tube with a ring-shaped constriction. Perianth tube approx. 5 mm long, expanding above, lower part without scales, pale olive-brownish. Scales only at the end, oblong, approx. 2-8 mm long, merging into the outer perianth segments, pale brownish green with light edge, reddish median, at the end with a somewhat curved, russet coarse hair-like tip, filaments white, anthers chrome yellow. Style white, approx. 12 mm long. Stigma lobes 5-6, overstanding the stamens, approx. 2 mm long, white, spreading, very papillose, almost hairy.

Stem

Bluish to greyish to yellow-green, older parts with whitish markings, up to 7 cm tall , 4,5-5 cm in diameter; apex barely sunken, with black spines tips emerging from a dense white woolly coat.

Radial Spines

6 or 7, up to 2 cm long, awl-shaped, straight or with the tip curved, white in the basal portion and black at the tips, becoming completely whitish as they ages. Old spines dirty dark grey brown and packed together.

Fruits

Green dehiscing longitudinally.

Areoles

Elliptical up to 2 mm long, with abundant ephemeral wool, later only with a tuft of wool in the short furrow, soon completely bald and corky.