Xerophyte

Description

Globular usually solitary cacti up to 10 cm in diameter .

Flowers

55-110 mm wide, magenta with a red throat from early spring to autumn.

Spines

Centrals 3, 15-75 mm long, ochre to reddish. It has been described as having only one, porrect, central spine, but with a careful observation it is possible to notice that the upper central spines are so appressed to the stem that they can be easily mistaken for radials. Therefore commodus has three central spines, as does the type species. Radials 8-18, 10-30 mm long, ochre to reddish, straight, acicular.

Ribs

8, distinct. Tubercles rounded. Areoles with glands.

Stem

ovoidal, 8-20 cm tall, 5-12 cm wide.