Xerophyte

Central Spines

4 (or more) stronger, straight or recurved and spreading, often darker at the tips..

Flowers

Pretty relatively small up to about 4 cm long, bi-coloured with magenta, rose to the violet petal tips and pinkish-white, white or yellowish-white throat, giving the sensation of being fluorescent and being very difficult to photograph in good conditions because that particularity.

Blooming Season

Blooms early in late winter to spring. It is advisable to leave them dry from middle of November to obtain fantastic flowering later in January/March.

Spines

Nearly hiding the ribs, acicular, more or less long and dense, white, yellowish, golden yellow, brown, or nearly black, while older one became greyish.

Ribs

up to 20

Stem

Solitary, but sometimes branched, globular to columnar, up to 90 cm tall (or more), up to 10 cm wide. Grey-green, brownish-green or blackish-green. ("clavata" means "club shaped" and refers to the usually cylindrical stem shape of this form)

Radial Spines

8-30, radiating,

Fruits

Ovoid to cylindrical, partly hollow at maturity, only scarcely woolly, apical areoles not spinescent.