Mammillaria hahniana Werdermann 1929


Neomammillaria mendeliana Bravo 1931, Mammillaria mendeliana (Bravo) Backeberg 1931, M. hahniana subsp. mendeliana (Bravo) D. R.Hunt 1997

Mammillaria woodsii R. T. Craig 1943, M. hahniana subsp. woodsii

(R.T.Craig) D.R.Hunt 1997 Mammillaria bravoae R. T. Craig 1945, M. hahniana subsp.bravoae (R.T.Craig) D.R.Hunt 1997

Plants usually forming clumps. Stems globose, light green, to 9 cm (3.5 in) high and 10 cm (3.9 in) in diameter. Tubercles numerous, small, triangular conical, with latex, axils with 20 or more white bristles 35-40 mm (1.4-1.6 in) long. Central spines 1-4, white with reddish tips, to 4 mm long. Radial spines 20-30, sometimes absent or nearly so, hairlike, white, 5-15 mm (0.2-0.6 in) long. Flowers purplish red to pink, 12-15 mm (0.5-0.6 in) in diameter. Fruits club shaped, red, 5-7 mm (0.2-0.3 in) long. Seeds brown. Distribution: Guanajuato, Tamaulipas, and Querétaro, Mexico.

Four subspecies of Mammillaria hahniana are recognized. Subspecies hahniana usually has only one central spine, 20-30 radials, and purplish red flowers; it occurs in Querétaro, Guanajuato, and Tamaulipas. Subspecies bravoae usually has 2 central spines, 28-30 radials, and deep pink flowers; it occurs in the Rio Blanco region of Guanajuato. Subspecies mendeliana often has 2-4 central spines, poorly developed or no radials, and pale pink flowers; it occurs in Guanajuato and Querétaro. Subspecies woodsii usually has 2 central spines, 25-30 radials, and pink flowers; it occurs near Hacienda de Tarajeas, Guanajuato.

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