Psiloparmelia gen. nov. "It is based on Parmelia distincta Nyl. (Psiloparmelia distincta (Nyl.) Hale, comb. nov.) from the high Andes Mountains. A second species, P. arhizinosa Hale, sp. nov., has been discovered in Lesotho. The genus is characterized by a velvety lower surface without rhizines, a negative test for lichenin, and a high concentration of usnic acid and atranorin in the cortex