Xerophyte

Central Spines

One, hooked, chestnut brown, becoming dark with age, to 18 mm long.

Seeds

Black.

Description

Mammillaria tonalensisSN|30214]]SN|30214]] is a small columnar cactus usually freely clustering from offsets with white radial spines and a single chestnut-brown hooked central. The flowers are carmine with whitish margins, but the plant is reluctant to produce its flowers unless the sunniest spot is found.

Roots

Fibrous.

Flowers

Carmine with whitish margins, to 15 mm long, 10-12 mm in diameter.

Stem

Erect or sprawling, slender cylindrical, and ofsetting light green, to 12 cm or more high, 2-3.5 cm in diameter. Tubercles obtusely conical, axils naked or slightly woolly.

Radial Spines

9-12, needle-like, straight, chalky white with brown tips, to 10 mm long.

Fruits

Bright red.