Dimelaena oreina, the golden moonglow lichen, is a greenish yellow placodioid lichen.

[2] The color of the greenish yellow thallus is derived from usnic acid in the cortex.

[2] The lichen grows on steep surfaces of hard siliceous rock from 400 to 2,800 metres (1,300 to 9,200 ft).

[2] It has a worldwide distribution outside the tropics, Australasia, and Antarctica.

[2] It is common in the Sonoran Desert of Arizona, California, Baja California, Baja California Sur, Sonora, Mexico, and Chihuahua, Mexico.