Gymnocalycium Calochlorum Cactus plant

Gymnocalycium Calochlorum Description: Small flattened cactus that can be found very clumped in habitat.
Stem: About 6 cm wide and 4 cm. high.
Ribs: Flat and tuberculate 8 to 12 (but generally 11), the tubercles are polygonal +/- rounded divided by short transversal grooves .
Areoles: Oval, covered with a yellowish tomentum that tends to whiten as they age
Radial spines: 9-13, they are thin of different length, 5-10 mm long, curved inward and very close to each other. They are white or sometime with a reddish basal portion.
Central spines: Absent.
Flowers: Pale pink, are born near apex, about 6 cm long and 7.5cm in diameter. Flower tube is green scaled. They does not open completely.
Fruit: Ovoidal to clavate 1,2-3,5 cm long more or less elonged, epidermis is greenish with a grey-bluish pruine coat. It is covered by small rounded scales bordered with white and contains a large quantity of seeds with the length of 1 mm.

There are many varieties and forms of G. chaloclorum relatively similar but with stems of variable colour an size, among them:

• “proliferum” with a little bigger stem of a darker green colour, and with flowers that open completely, showing curved petals to the outside and of white, brownish white, or pink colour.
• “roseiacanthum” with smaller stems of about 3 cm. wide and 2 cm. high, showing areolas of yellow colour with twisted spines of pink colour and big flowers of white colour with the pink base