Protolog: Thallus plumbeo-griseus vel partim fuscidulus, foliaceus, tenuis, lobatus; lobi steriles ad corticem arboris plane adnati, superne laevis, glabri, plus minus imbricati, marginibus minute lacinulatis, circ. 3-4 mm. lati, subtus pubescentes vel partim glabrescentes, epapillosi; lobi fertiles erecti, superne hic illic isidiati, isidiis squamaeformibus, tomentelli, ad peripheriam pubescentes et glabrescentes, subtus dense tomentelli, epapillosi, marginibus crenulatis, isidiosis, isidiis squamaeformibus. Cortex superior 18-28 µ crassus, paraplectenchymaticus, cellulis rotundatis.