Xerophyte

Habit

It is usually solitary (it has a tendency to remain the same in the culture). It reveals its true beauty only as it becomes 10 or more years old, and reaches 35 cm in height.

Central Spines

Usually 4 to 7 (but sometime up to 10), straight, stronger than the radial, 8 mm long.

Seeds

Brown, club-shaped, 1,2 mm long and 0,6 mm wide. Hilum small and basal.

Description

Mammillaria pachycylindricaSN|15974]]SN|15977]] is one of the largest species in the genus and usually solitary. It is also known by many to be synonymous with Mammillaria grusoniiSN|15977]]SN|15974]] ,but Reppennhagen considered it a separate form with, darker body, more spines, (20–23 radials and about 6 centrals), different colour of flowers and more cylindrical growth than grusonii.

Roots

Fibrous.

Tubercles

Pyramidal, terete, basally four-angled, slightly carinate, up to 12 mm tall, 10 mm wide, firm, with latex. The axil is naked or felty.

Flowers

Diurnal, bell shaped, dull pink to yellowish brown with a wide brownish-pink midstrip, up to 20 mm long and in diameter.

Blooming Season

Spring, and flowers remain open for about three or four days.

Stem

Cylindrical, dull green, up to 35 cm tall and 14 cm in diameter.

Radial Spines

20-23, straight, needle-like, thicker at base, upper ones shorter, 4-8 mm long, at first greyish brown, brown to black with darker tips, later becoming grey.

Fruits

Scarlet, club shaped, up to25 mm long and 8 mm wide.

Areoles

Elliptic, 3 mm long.