Mammillaria marcosii

Mammillaria  marcosii is a small clumping plant with a wide range of thorn colours
This is one of  the best colour form with white radials and bright yellow central spines.

Description:  It 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.
Spines: Radials: 16 - 25, radiating, needle-like shining white, 4 - 12 mm long. Centrals: 7 - 14, mostly needle-like,  yellow , 10 - 20 mm long one of which is descending and slightly hooked, all other straight.
Flower: Yellowish white with pinkish tint up to 10 mm in diameter.
Fruits: Red, 6 - 13 mm long, not arising above the spines.

Family: Cactaceae (Cactus Family) 

Scientific Name: Mammillaria marcosii W.A.Fitz Maur., B.Fitz Maur. & Glass 1997
Published in:Cactus and Succulent Journal (U.S.).   69(1): 10-14 (1997)

Origin: Guanajuato (Municipio Atarjea), Mexico. Altitude 1.400 m.

Habitat:  Grows on volcanic rocks.

Photo of conspecific taxa, varieties, forms and cultivars of Mammillaria marcosii.

• Mammillaria marcosii
• Mammillaria marcosii "YELLOW SPINE"