Echinopsis macrogona

Echinopsis macrogona, syn. Trichocereus macrogonus, is a species of cactus found in Bolivia. 
Description.
It has a shrubby habit, with erect columnar stems around tall and in diameter. The stem is bluish green with 6–9 prominent ribs. The gray colored areoles have yellow-brown spines; there are 1–3 longer central spines, up to long, and 6–9 shorter radial spines, up to long. Large white flowers, up to long, are borne at the top of the stems.