Xerophyte

Habit

Plants usually solitary. Multiple branches may also been produced when the apex is damaged.

Central Spines

4, cross shaped up to15 mm long.

Seeds

With a distinctive longitudinally-oriented fine striate cuticular sculpturing.

Flowers

6 or more produced together around the stems apex, sulfur yellow, to 6 cm long and 7 cm in diameter.

Spines

Thin needle-like or bridtly, rusty-red or or brownish turning grey as they age.

Ribs

Numerous (up to 40), straight, low, with many fairly large chinlike humps below the areoles.

Stem

Spherical to club shaped, yellow-green, slightly depressed apically, to 13 cm high and 10 cm in diameter.

Radial Spines

10-20 adpressed or more or less erect, to 5 mm long.