| Noun | 1. | Oligoporus leucospongia - a pore fungus with a whitish cottony soft cap found on conifer logs in forests at high elevation in the western United States and adjacent Canada family Polyporaceae, Polyporaceae - fungi that become corky or woody with age, often forming shelflike growths on trees polypore, pore fungus, pore mushroom - woody pore fungi; any fungus of the family Polyporaceae or family Boletaceae having the spore-bearing surface within tubes or pores; the fruiting bodies are usually woody at maturity and persistent |