Xerophyte

Central Spines

2 (to 6) pure white or white with dark tip that protrude far out from the rest, straight or slightly curved, up to 4 cm long (or more).

Seeds

Brown.

Description

Mammillaria geminispinaSN|14012]]SN|14012]] is a highly variable densely spined species. Some cluster aggressively and will eventually grow into a large plant form 30 to 90 cm large with many broad stiff stems. The var. nobilis is one of the finest species in the genus distinguished by fewer but longer central spines that are of the same lenght.

Tubercles

Rounded with latex. The axil is filled by white wool and 10 - 20 long white bristles.

Flowers

Campanulate, pinkish to carmine red, with darker midveins, to 20 mm long and in diameter usually in a ring in the growth of the previous year but sometime more randomly over the body. If grown from seed, M. geminispina can take seven to eight years before flowering.

Spines

Spines variable but noticeably longer then in other form and varieties.

Stem

Short cylindrical, light green whit latex, up to 18 cm high and 8 cm in diameter.

Radial Spines

16 to 20 chalky white, interlacing up to 7 mm long.

Fruits

Red