Bearded Tooth (Lion’s Mane; Hedgehog Mushroom)
Beardlike, whitish mass; grows on trunks of living deciduous trees and on fallen trees and logs. August–November. Fruiting body a round, unbranched mass of long, hanging, toothlike spines, each ½–2 inches long; spines hanging evenly from a central base; white, becoming yellowish; texture smooth. Stalk not present. Spore print white. Spores magnified are almost round, smooth to roughened with dots, colorless.
Lookalikes: Comb tooth (H. coralloides) has multiple branches covered with tufts of short spines and grows on decaying trees. Although another fungus, Hydnum repandum, is also called "hedgehog" and also has spines (or "teeth"), it looks very different: It has a cap and a stalk and is orangish tan.