Xerophyte

Central Spines

7 - 14, mostly needle-like, yellow, 10 - 20 mm long one of which is descending and slightly hooked, all other straight.

Description

Mammillaria marcosii Yellow SpinesSN|20795]]SN|20795]] forms irregular clumps of low round to short cylindrical stems up to 5 cm in diameter. Tubercle are soft, cylindrical, with round tips. In the axil there are wool and up to 15 bristles to 15 mm long.

Flowers

Yellowish white with pinkish tint up to 10 mm in diameter.

Radial Spines

16 - 25, radiating, needle-like shining white, 4 - 12 mm long.

Fruits

Red, 6 - 13 mm long, not arising above the spines.