The fruit body is a bracket-like growth from wood, of a tough corky to leathery texture with gills on the underside but these, though generally more-or-less radially aligned, are often of varying lengths and arranged a little irregularly, so as to give the underside a somewhat maze-like appearance. In some cases there may be cross walls between the gills so that pores of various shapes are produced. The brackets often extend only a few centimetres out from the wood (but sometimes to more than 10) but the length along the wood is usually greater. The brackets may be a centimetre or two thick.
The upper surface may be smooth or hairy and is coloured in shades of yellow-brown, orange-brown or dark-brown. There is concentric banding. The colour of the underside may be greyish brown, yellow brown or dark brown.
Found on conifers, native or introduced.