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Mammillaria plumosa

Mammillaria plumosa is a species of flowering plant in the family Cactaceae, native to Northeastern Mexico. It grows to 12 cm tall by 40 cm broad. The clustering spherical stems, 7 cm in diameter, are completely covered in white downy spines. Clumping plants form low, dense mounds sometime up to 40 cm wide entirely covered by the mass of white feathery spines. Stems: Depressed globose or somewhat elongate, without latex, spherical, 4- 7 cm high and in diameter. Light green, but appearing white because of the dense spines. Needs regular water in summer, but for best appearance keep water off of the spines. Do not let the soil become too dry in winter, either. It does better with a good drained soil mix since it is a rot prone species, whose roots are easily lost in pots that stay damp for any length of time. It takes a couple of years to offset, but once it starts it can fill a 25cm pot in just a few years. Propagation: Seeds, offsets (Cuttings root quickly). Needs full sun or light shade in summer. Regular water in summer, do not let the soil comes too dry in winter either. Still provide good drainage since it is a rot prone species.