A large, fleshy, annual polypore with a clustered growth form aof many individual caps arising frm a common bassal stem.  Caps are grey-brown in colour, blackening when bruised.  The pores are large, angular and white from a woolly fertile surface, 2 - 4 per mm.

Photograph whole cluster and upper and lower fertile surface or individual caps to show pores; note host plant and substrate

Decduous trees, typically the base of oak

Summer and autumn.

Status in Leicestershire and Rutland not known.