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Description:
Mammillaria erythra f. rubber (Now referred to M. mystax) is an
attractive plant with very dark carmine flowers and characteristic
epidermis, which clearly differentiates it from Mammillaria mystax.
Furthermore
M. erythra has a solitary growth and a different body size.
Stem: Dull green, that reddens in full sun, globose with an almost
a flat-topped appearance, 40-90 mm high and 70-300 mm in diameter.
The
apex is sunken and wooly.
With latex.
Roots: Fibrous.
Tubercle: Pyramidal, firm, 4- angled, keeled, 15 - 18 mm long and
12 - 15 mm wide.
The axil has white wool and 3 - 10 short, glassy white
with reddish brown tip, straight bristles
Radial spine: 0 - 8, needle-like, straight, smooth, whitish to
brown, 2 - 6 mm long.
Central spine: 1 - 4, the uppermost the longest, needle-like,
straight or slightly curving, with thicker base, glassy brown with black
tip,
up to 50 mm long.
Flower: Dark carmine, funnel-form, 18 - 22 mm long and 10 - 12 mm
in diameter.
Fruit: Dark carmine, club-shaped, 10 - 15 mm long and 3 - 5 mm
wide,
it ripens 5 months after flowering.
Seed: Brown, flattened keeled, 1,2 mm long and 0,8 mm wide. Hilum
subbasal.
Blooming season (Europe): Mainly in spring (and sometimes other
times of year). It doesn't bloom frequently.
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Cultivation
and Mail Sale 
