Xerophyte

Central Spines

Absent.

Seeds

About 4 mm long and 1 mm in diameter, light brown.

Description

Coryphantha bumammaSN|3933]]SN|3933]] is a flattened globular cactus with few, very large, rounded tubercles, bluish green. In adulthood it produces an abundant amount of attractive wool that covers its body. This will wash off if watered from above but will re-grow again. It is very similar to Coryphantha elephantidensSN|3920]]SN|3920]] but the flower are smaller and nearly yellow.

Roots

It has a stout carrot-like root, almost equal in diameter to that of the stem itself.

Note

At the moment there are a number of strongly offsetting plants in circulation labeled as Coryphantha bumammaSN|3933]]SN|3933]]; whilst being attractive plants these are not natural plants but mutant clones also known as caespitosa or prolifera. This plants may form large groups up to 50 cm in diameter.

Tubercles

Few, very large up to 27 mm wide and 16 mm tall, glossy green to bluish-green always broader than rounded, in 8-13 series, conical flattened, rounded on top, slightly pentaedrical at the base, with a woolly groove on the upper side. The axil in youth is very woolly, later naked. Without glands.

Flowers

Sweet smelling large 5- 6 cm broad, yellow with reddish midstripe dorsally or bright rose with a dark stripe, inner perianth segments narrowly oblong to lanceolate, margin entire, acute, 5 mm wide, filament reddishat the base, lobes greenish, stigma longer then filaments.

Blooming Season

The flowers generally appear mid to late summer.

Stem

Flattened globular, broader than high, often (in habitat) arising only a little above the surface of ground, and are firmly anchored in the soil by a thick root, almost equal in diameter to that of the stem itself, up to 13 cm in diameter.

Radial Spines

The tubercles are capped with a 5-8 of stout, stiff, evenly spreading, reflexed radial spines, 16-26 mm long, subulated, curved, never porrect, but adpressed to the body, usually 3 more strong are on the sides greyish or brownish with darker tips

Fruits

Claviform, very big, ca. 4 cm long, 10-13 mm diameter, whitish green with a reddish tinge.

Areoles

Elongate up to 4 mm long.