Echinopsis calochlora, is a species of Echinopsis found in Bolivia.[1]
Echinopsis calochlora grows singly or in groups. The spherical to short cylindrical, dark green shoots reach heights of growth of with a diameter of . The shoot apex is slightly depressed. There are about 15 sharp-edged ribs up to high that are notched. The circular, gray areoles located on them are up to apart. Dark grey, needle-like thorns emerge from them, which are thickened at their base. The single, horizontally protruding central spine is long. The eight to nine slightly unequal radial spines have a length of .
The narrow, funnel-shaped, long tubular, white flowers open at night. They are up to long and have a diameter of . The spherical to ellipsoidal, dark green fruits tear open.[2]
Echinopsis calochlora is distributed in the Bolivian department of Santa Cruz in the lowlands around 600 meters.
The first description by Martín Cárdenas was published in 1956. The specific epithet calochlora is derived from the Greek words kalos for 'beautiful' and chloros for 'green' referring to the plant's shiny green epidermis.