Xerophyte

Habit

It is a (usually) solitary geophytic cactus with five ribbed appearance.

Central Spines

Usually absent, or 1 erected one.

Flowers

Are some of the largest in this genus, often growing larger than the plant!, 6 up to 7 cm long and wide, pure white and double petaled. Self-fertile!

Ribs

5-7, rounded, grooved transversely. Tubercles few per ribs, more prominent and "chinned" than in standard Gymnocalycium denudatumSN|1724]]SN|7888]].

Stem

Flattened or globular, grey-green to olive green, 5-6 cm in diameter, up to 5 cm tall, but in cultivation it can become 7-8 cm high (or more) over the years.

Radial Spines

Stout 5-7 up to 12, but usually less in young plants, flattened against the body.

Fruits

Green.