Xerophyte

Central Spines

Absent.

Description

Mammillaria karwinskianaSN|20736]]SN|20736]] is a solitary, or slowly branching dichotomously (or basally) cactus, with cream coloured 'snowy' tomentum on the top of the plant. Four subspecies are recognized, the nominate, ssp. beiselii (Diers) D.R Hunt, ssp. collinsii (Orcutt) D.R.Hunt and ssp. nejapensis (R.T.Craig & E.Y Dawson) D.R.Hunt.

Tubercles

Firm, pyramidal, arranged spirally with 13-21 parastichys.

Flowers

Funnel-form, cream-white to yellow with purplish mid-veins, up to 25 mm long and 15 mm in diameter. Blooms adorn the crown of the plant, usually in a ring, in the growth of the previous year.

Blooming Season

Early spring.

Stem

Globose to short cylindrical, blue-green to dark green, up to 12 cm in diameter, 8-20 cm tall. With latex. The Axil is very woolly, with tufts of white hair and long white bristles.

Radial Spines

Usually 6, awl-like, straight to slightly curved, cream to reddish tipped with brown, becoming chalky white with age, 4 - 30 mm long, upper and lower ones longest.

Fruits

Red, elongated, and quite attractive.