Xerophyte

Central Spines

3-4 up to 12 mm long, thin, white with brown to dark-red tips, more or less curving, forming a cross. New spines red.

Seeds

Cap shaped, black tuberculate, 1 mm in diameter.

Flowers

Diurnal, opening in during the day and closing at night. Yellow flower, 6-7 cm in diameter. Floral tube with whitish wool and long brownish bristles.

Blooming Season

Spring to early summer.

Ribs

16-23 low, obtuse.

Stem

Up to 8(-10) cm across, glaucous blue-green, spherical to short cylindrical, more or less flattened apically.

Radial Spines

10-12 up to 10 mm long needle-like, sreading.

Fruits

Oval, yellowish green, up to 1,2 cm long and 0,7 cm in diameter.