Echinopsis calochlora.
These are small, rounded, clump forming cacti up to 15 cm high.
The green stem is deeply ribbed and the areoles have short hairs and golden spines.
The funnel shaped flowers, 10 to 15 cm across, have a hairy tube.
The outer tepals are off white and the inner, pure white ones have a mucro at the tip.
The numerous anthers are a pale cream.
J.F.
