Thallus orbicular to irregularly spreading, loosely attached, corticolous or saxicolous, to 20 cm diam. Lobes very variable, broad, sparsely incised, to narrow, linear-laciniate, margins entire to deeply incised, often sorediate. Upper surface shining, dark brown to pale yellowish-buff, often with a bluish-lilac tinge, or reddish-brown, smooth to ± reticulate-faveolate, sorediate, without isidia, maculae or pseudocyphellae. Soredia farinose to coarsely granular, whitish to grey-blue or mauve, in ± linear marginal lines or in rounded, laminal, pustular soralia. Medulla white. Photobiont blue-green. Lower surface tomentose to margins, tomentum thick, felted, pale to dark chocolate-brown, pale brown and ± glabrous in a narrow zone at lobe apices. Pseudocyphellae white, scattered, rather sparse, sunk in tomentum. Apothecia not seen. Chemistry: 7β-acetoxyhopan-22-ol, hopane-7 β,22-diol (tr.), hopane-15α,22-diol, tenuiorin, methyl gyrophorate.