External characters
Ranging from thinly encrusting following contours of the substrate, sometimes with surface convulted, often with erect flat lobate lamellae, or sometimes with bifurcate digitate projections, both up to several cm long and extending a long distance from surface. Margins relatively thick, not crenulated.
Colour
Variable in situ, possibly depending on growth form and light regime, ranging from pale bluish grey, mauve grey, pale mauve, pale green, yellowish green, light brown to orange brown. Brownish grey in ethanol.