Xerophyte

Central Spines

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.

Seeds

Brown, flattened keeled, 1,2 mm long and 0,8 mm wide. Hilum subbasal.

Roots

Fibrous.

Note

The f. ruber is a "nomen nudum", an undescribed name used commercially to indicate one of the local forms of Mammillaria erythraSN|20663]]SN|20663]], and the two are not distinguishable, if not for the geographical provenance.

Tubercles

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.

Flowers

Dark carmine, funnel-form, 18-22 mm long and 10-12 mm in diameter.

Blooming Season

Mainly in spring (and sometimes other times of year). It doesn't bloom frequently.

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.

Radial Spines

0-8, needle-like, straight, smooth, whitish to brown, 2-6 mm long.

Fruits

Dark carmine, club-shaped, 10-15 mm long and 3-5 mm wide, it ripens 5 months after flowering.