Véliz Pérez M. E., Myrtillocactus eichlamii Britton & Rose (Cactaceae) a local endemic species poorly known from Guatemala, Cactus-Aventures International, 2008, (80):24-27
The field account describes the tree-like habit and flowers of Myrtillocactus eichlamii. It presents El Progreso localities and local flowering season. Photographs document plants, flowers and fruits.