Dimelaena oreina

Dimelaena oreina, the golden moonglow lichen, is a greenish yellow placodioid lichen. The color of the greenish yellow thallus is derived from usnic acid in the cortex.

Habitat and range

The lichen grows on steep surfaces of hard siliceous rock from. It has a worldwide distribution outside the tropics, Australasia, and Antarctica. It is common in the Sonoran Desert of Arizona, California, Baja California, Baja California Sur, Sonora, Mexico, and Chihuahua, Mexico.