Thallus usually developing as a bunch of several palmate, elongate or tongue-shaped lobes, without a distinct stipe, the lobes eventually becoming ± orbicular and overlapping, usually 1–3 cm diam., fragile and papyraceous, rather brittle when dry. Lobe apices slightly undulating, usually slightly revolute, the margin entire to crenate and sinuose, and entirely covered with soralia resulting in a somewhat swollen edge. Upper surface smooth, pale to dark brown or greyish in wet or dry conditions, sometimes faintly maculate, cilia absent. Soralia always present, erupting from the medulla just underneath the upper cortex, mostly towards the margins. Soredia rather coarse to farinose, typically bluish grey, rarely brownish. Lower surface shallowly ribbed to scrobiculate, white or pale orange to brownish, rarely darker towards the centre in old thalli, with sparse to dense tomentum (absent in some thalli). Cyphellae abundant, round or angular, cupuliform to urceolate with a wide pore, the margin erect, slightly revolute, whitish to cream or brownish, 300-1000 µm diam, the surface cells not papillate. Photobiont Nostoc. Anamorph and teleomorph: not known.