Xanthoparmelia tumidosa

Xanthoparmelia tumidosa is a species of saxicolous, foliose lichen in the family Parmeliaceae. Found in Southern Africa, it was formally described as a new species in 1986 by the American lichenologist Mason Hale. The type specimen was collected about south of Nuwerus on R363 at an elevation of about, where it was found in a pasture growing on a large sandstone ledge. The lichen thallus, leathery in texture and tightly attached to its rock, is bright yellowish green and measures wide. It comprises short, somewhat linear that are 1.5–2.0 mm wide and become crowded and at the thallus center. X. tumidosa contains protocetraric acid and usnic acid.