Description: Small solitary
offsetting plants that
eventually forms tiny mounds.
Stems: Heads 3,5 to 6 cm in diameter, 2 - 4 cm high,
dark green, soft,
globoid, flattened-globose, to shortly cylindrical..
Tubercles: Small, clavate
4-5 mm high, With a woolly axil and
Central spines: 0 - 1 or 2 (occasiaonally 4). The long central
spine is not present on all the clones, yellowish,
hooked, to 8 mm long, pubescent.
Radial spines: 28 - 36,
acicular, thin, white, brownish at base,
pubescent, 3.5 - 4 mm long,
interlacing and densely wrapped against the body of the cactus
Flowers: Funnel-form, less deeply set,
yellowish/cream to light
yellow, about 20 mm long and in diameter.
Inner segments lanceolate, widely spreading, accuminate, style and
stigma lobes greenish.
Blooming season: Flowers
readily, and for a long period from spring
to the early summer..
Fruit: Light red to red,
Seed: Blackish brown.
Taxonomy: This plant is a member of
the Mammillaria crinita
complex (Stylothele Series).
authors consider M. duwei
to be a good
species; the others classify it as M. crinita (e.g.
According to Anderson's classification, this species is considered as a
synonym of M. crinita)