Pyxine consocians

About

Pyxine consocians is a species of foliose lichen in the family Caliciaceae. It was first described from the Philippines, growing on tree bark, and has since been found widely across Asia and the Pacific, including India, South Korea, Sri Lanka, Thailand, and the Gilbert Islands. The lichen forms a thin, leaf-like thallus with a bluish-grey upper surface and produces small black fruiting bodies. Chemical studies have identified several compounds in the lichen, including atranorin, zeorin, and lichexanthone.

Summary from Wikipedia