Polyporus radicatus Schw. Cap 3.5-25cm across, circular, convex to sunken; yellowish brown to soot brown; dry, velvety to scurfy. Tubes 1-5mm deep, decurrent. Pores 2-3 per mm, angular; whitish to yellowish. Stem 60-140 x 5-25mm, central, with a long black rooting base; dingy yellow; scurfy to slightly scaly. Flesh white, dense. Spores ovoid to ellipsoid, smooth, 12-15 x 6-8µ. Deposit white. Habitat usually singly on the ground around stumps or attached to buried roots. Not common. Found in central and eastern North America. Season August-October. Not edible.