myrtillocactus geometrizan

Native to central Mexico, Myrtillocactus geometrizan inhabits limestone rocky slopes. It is a polycarpic species forming branched columns up to 3 m tall. Unique within its genus for its regular geometric growth and symmetrically arranged spines along 8-10 ribs. Cylindrical stem with 8-10 distinct ribs, radial spines 1-2 cm long, green-blue color shifting to gray in summer. Growth in erect columns with short, thick secondary branches.