Inonotus radiatus (Sow. ex Fr.) Karst. Strahliger Schillerporling Polypore radié, Alder Bracket Inonotus radiatus (Sow. ex Fr.) Karst. Bracket 2–9cm across, 1–6cm wide, 1–2cm thick, in tiers, woody; upper surface becoming glabrous, uneven and radially wrinkled, apricot at first then rusty, finally almost black, margin paler, thin and acute. Flesh rusty brown, woody. Taste bitter, smell faint and sweet. Tubes 3–8mm long, rusty-brown. Pores 3–4 per mm, circular or angular, glancing silvery in the light. Spores yellowish, ellipsoid, 4.5–6´3–4.5m. Hyphal structure monomitic; generative hyphae lacking clamps. Setae in tubes, thick-walled, dark brown, fusiform with curved pointed apex. Habitat parasitic on alder and occasionally certain other deciduous trees. Season all year, annual but often persisting in old blackened state throughout the year. Frequent. Not edible. Distribution, America and Europe.