Mammillaria bocasana (Syn: Neomammillaria bocasana) is a clumping cactus, often forming large mounds. It is commonly called the “Powder Puff Cactus”, because of its appearance like a cotton ball as the small round plant is covered with silky white hairs. It is quite variable with a lot of different varieties and forms available in cultivation. Generations of cactophiles have had this plant as one of their first acquisitions and few can have been disappointed by its easy cultivation and free-flowering habit.Stems: Individual stems spherical, sometimes becoming somewhat cylindrical. light green to bluish-green, 5-8(-12) cm tall and 3-6(-8) cm in diameter.Tubercles: Slender, soft, cylindrical, terete, 6 to 8 mm long, their axil sometimes hairy or bristly.