Xanthoparmelia esterhuyseniae

Xanthoparmelia esterhuyseniae 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 from the Hex River Mountains at an elevation of, where it was found growing on a sandy rock surface on a plateau. The species epithet honors Elsie Elizabeth Esterhuysen, "who has hiked to the tops of so many difficult high peaks in southwestern Cape Province and discovered a number of new species in the Parmeliaceae".