Xerophyte

Habit

Plants solitary or forming loose clumps.

Central Spines

1-3, thick, porrect, pointing upward, 1,5-5 cm long.

Seeds

1,7-2 x 1,3-1,5 mm.

Flowers

open funnelform, Pale yellow, 3-4 cm long. Scales of ovary and flower-tube hairless in their axils. Outer perianth-segments narrowly ovate, acute, reddish; inner perianth-segments broadly oblong, obtuse.

Spines

Black to brown, becoming gray with age.

Ribs

8-12(-13), straight, rounded, slightly humped.

Stem

At first globose, then short cylindrical to cylindrical, grass green, 20-40 cm high, 5-8 cm in diameter, very woolly at apex.

Radial Spines

5-10, awl shaped, stout, straight or somewhat curved, 1-2(2,5) cm long.

Fruits

Round to elongate, 1,5 cm on diameter.

Areoles

Small to large, ovate , with thick white-brownish felt, close set to confluent,.