Inonotus dryadeus (Pers. ex Fr.) Murr. Eichenporling Oak Bracket syn. Polyporus dryadeus Pers. ex Fr. Bracket 10–65cm across, 5–25cm wide, 2–12cm thick, or sometimes forming large, irregular cushions, corky; upper surface uneven, white-grey becoming brownish, finally very dark, margin broadly rounded and paler, exuding drops of yellowish liquid. Flesh rusty brown, fibrous. Tubes 5–20mm long, rusty-brown. Pores 3–4 per mm, circular then angular, white-grey becoming rusty. Spores white to yellowish, subglobose, 7–9´6.5–7.5m. Hyphal structure monomitic; generative hyphae lacking clamp-connections. Setae in the tubes dark brown with swollen base and hooked pointed tips. Habitat parasitic on various species of oak, found at the base of trunks. Season all year. Uncommon. Not edible. Distribution, America and Europe.