Eulychnia iquiquensis is treelike cactus of the Order Caryophyllales. It is endemic to the northern part of the Atacama Desert.
- Copao can grow up to a height of 3 meters. It is pretty spineless below, but Copao is spiny toward the top. The trunk of the Copao is generally short. It is multi-branched.
- The areolas of the Eulychnia iquiquensis are covered with white wool.
- The white flowers of the Eulychnia iquiquensis are made up of 7-14 petals. The flowers are near the tips of the shoots.
- The flower buds are globular and are covered with silky white hairs.
- The fruits of the Copao are spherical. They are covered with white wool.
