Climacocystis borealis (Fr.) Kotlaba & Pouz. Fruit body annual; no stem. Bracket 15cm across, 8cm wide. 4cm thick, fan-shaped to broadly stalk-less, fiat and semicircular, often overlapping; white to cream or straw-colored when fresh, becoming darker when dry; soft and watery when fresh, dry, brittle and often with radial lines when dry; felty to hairy, becoming partly smooth and partly covered in stiff hairs when dry. Tubes up to 5mm deep; same color as pores. Pores 1-2 per mm, thin-walled, angular; white to cream or light straw. Flesh duplex, with a lower dense layer up to 2cm thick; whitish. Taste mild. Spores broadly ellipsoid, smooth, thin-walled, 4.5-6.5 x 3-4.5µ. Hyphal structure monomitic. Habitat on dead or living conifers and rarely on deciduous wood. Often abundant. Found widely distributed in coniferous forests in North America, excluding the southern pine region. Also in Europe. Season August-November. Not edible.