Plants solitary or forming clumps. Taproots present. Stems globose, pale green, to 5.5 cm (2.2 in) high and in diameter. Tubercles conical, axils naked. Central spines 4-5, brown with darker tips, to 6 mm (0.2 in) long, lowermost one hooked. Radial spines 30-32, bristle-like, white, 6-7 mm (0.2-0.3 in) long. Flowers white with pink midveins, 8-10 mm (0.3-0.4 in) long and in diameter. Fruits red. Seeds black. Distribution: Durango and Sinaloa, Mexico.
Mammillaria haageana Pfeiffer 1836 Mammillaria dyckiana Pfeiffer 1837 Mammillaria kunthii Ehrenberg 1844 Mammillaria meissneri Ehrenberg 1844 Mammillaria dealbata F. Dietrich 1846 Mammillaria donatii K. Schumann 1903 Mammillaria collinai. A. Purpus 1912
Mammillaria conspicua J. A. Purpus 1912, M. haageana subsp. conspicua (J. A. Purpus) D. R. Hunt 1997 Mammillaria vaupelii Tiegel 1933
Mammillaria elegans var. schmollii R. T. Craig 1945, M. haageana subsp. schmollii (R.T. Craig) D. R. Hunt 1997 Mammillaria albldula Backeberg 1961, not validly published Mammillaria san-angelensis Sánchez-Mejorada 1981, M. haageana subsp. san-angelensis (Sánchez-Mejorada) D. R. Hunt 1997 Mammillaria acultzingensis Linzen et al. 1994, M. haageana subsp.
acultzingensis (Linzen etal.) D. R. Hunt 1997 Mammillaria haageana subsp .elegans D. R. Hunt 1997
Plants usually solitary, sometimes clustering with age. Stems globose, glaucous green, to 15 cm (5.9 in) high, 4-11 cm (1.6-4.3 in) in diameter. Tubercles crowded, small, four-angled basally, without latex, axils slightly woolly. Central spines 1-4, usually 2, slender, black to reddish, straight to slightly curved, 6-10 mm (0.2-0.4 in) long. Radial spines 18-30, smooth, white, radiating, bristly, 3-6 mm (to 0.2 in) long. Flowers deep purplish pink to rose red to pinkish carmine, to 10 mm (0.4 in) long and in diameter. Fruits red. Seeds light brown. Distribution: Federal District and Veracruz, Puebla, México, and Oaxaca, Mexico.
Six subspecies of Mammillaria haageana are recognized. Subspecies haageana sometimes forms clusters, has stems 5-10 cm (2-3.9 in) in diameter, and deep magenta-pink to pale pink flowers to 15 mm (0.6 in) in diameter; it occurs in Puebla, México, Veracruz, Morelos, and Oaxaca. Subspecies acultzingensis is solitary, has stems less than 10 cm (3.9 in) in diameter, and deep carmine red flowers to 22 mm (0.9 in) in diameter; it occurs at Acultzingo, Veracruz. Subspecies conspicua tends to be solitary and has stems 10-11 cm (3.9-4.3 in) in diameter; it occurs in Puebla, Oaxaca, and Morelos. Subspecies elegans is solitary, has stems 5-8 cm (2-3.1 in) in diameter, and rose red flowers; it occurs in open, grassy areas in Puebla. Subspecies san-angelensis is usually solitary, has stems 4-7 cm (1.6-2.8 in) in diameter, and pink to carmine red flowers; it occurs in the valley of Mexico. Subspecies schmollii has narrow stems and reddish brown to black spines; it occurs near Mitla, Oaxaca.
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