Mammillaria albata is considered a synonym of M. hahniana (M. bravoae) by some authorities and by others as a form of M. geminispina. Whatever it is, it is a very beautiful form. This form comes from Pedro Montoya (San Ciro) in the state of San Luis Potosi, Mexico.Mammillaria petrophila is another beautiful cactus and rewards the grower with bright yellow flowers at this time of year. It hails from Southern Baja California, South of La paz, Mexico.
Mammillaria hernandezii is one of the smallest in the Genus Mammillaria and also displays some of the largest flowers for its size. From Sierra Mixteca, Oaxaca, Mexico.
Mammillaria laui v. subducta is one of three varieties of the same species found by Dr. Alfred Lau in the vicinity of La Reja, in the State of Tamaulipas, Mexico. The other two being M. laui v. laui and M. laui v. dasyacantha.
