Xerophyte

Central Spines

Absent.

Seeds

Brown.

Description

Mammillaria karwinskianaSN|20745]]SN|20736]] subs. nejapensis (Mammillaria nejapensisSN|20736]]SN|20745]]) is very variable, especially for the length of the spines, and at the beginning there were two recognized varieties

Tubercles

Tubercles firm, pyramidal with the lacteal juice, arranged spirally with 13-21 parastichys the axil is very woolly with many tortuous bristles.

Flowers

Diurnal, funnel-form, 18 mm long, 10 mm in diameter, pale cream with red-brown to scarlet midstripe on each petal. Blooms adorn the crown of the plant, usually in a ring, in the growth of the previous year.

Blooming Season

Spring to summer.

Stem

Globose to short cylindrical, somewhat wider in the upper part, blue-green to dark green, to 15 cm high and 5 - 7.5 in diameter, with latex. A cream coloured 'snowy' tomentum is present on the top of the plant.

Radial Spines

Only 3 - 5, awl-like, straight to slightly curved, ivory with reddish-brown tips, becoming chalky white with age, the upper shorter, 2 - 5 mm long, the lowermost the longest, to 25 or even 50 mm (or more) long.

Fruits

Bright or clear red elongated and quite attractive.