Xanthoparmelia subruginosa
Xanthoparmelia subruginosa is a species of saxicolous, foliose lichen in the family Parmeliaceae. Found in South Africa, it was formally described as a new species in 1986 by the American lichenologist Mason Hale. The type specimen was collected by Hale from the Oribi Gorge Nature Reserve at an elevation of, where he found it growing on flat sandstone exposures back from a cliff. The lichen thallus, which is loosely attached to its rock, is bright yellowish green and measures in diameter. It contains stictic acid, constictic acid, and usnic acid.