[6] The specific epithet badius derives from the Latin root badi-, meaning "reddish brown".

When young, the fruit bodies are convex, then become flat or funnel-shaped in maturity, reaching dimensions of 5–25 cm (2.0–9.8 in) across by 1–4 mm (0.04–0.16 in) thick.

The upper cap surface is smooth and glossy, but develops radial wrinkles as it ages.

Pores are round and number 6–8 per mm, with decurrent tubes (running down the length of the stipe).

[12] It grows on the standing or fallen trunks and branches of various hardwood genera, including Acer, Aesculus, Alnus, Betula, Castanea, Fagus, Fraxinus, Populus, Prunus, Robinia, Quercus, Salix, Tilia and Ulmus.