gymnocalycium calochlorum

Gymnocalycium calochlorum is native to central Argentina, growing mainly on calcareous rocky substrates. It is a slow-growing, polycarpic globular cactus with pronounced ribs. Its distinctive trait within the genus is the greenish-yellow epidermal coloration, uncommon among Gymnocalycium species. Globose stem 5-8 cm diameter with 7-9 ribs; oval areoles bearing 6-8 radial spines, central spines absent or minimal. Epidermis greenish-yellow, intensifying in summer. Flowers white to pale pink, 4-5 cm wide.