Mammillaria pennispinosa subsp. brachytrichion (Lüthy) U.Guzmán, Cat. Cactaceas Mex.: 148. 2003
Mammillaria pennispinosa subsp. brachytrichion, Cat. Cactaceas Mex.: 148. 2003
is new combination for Mammillaria brachytrichion in Kakteen And. Sukk. 38(12): 295. 1987