- fruiting body is a white, unbranching, oval-shaped mass up to 40 cm broad, draped with long white spines, each up to 3 cm long, yellowing in age.
- fruiting body is anchored to a tree by a solid, white base that is hidden from view.
- grows alone from wounds on hardwoods.
- appears in late summer and fall.
- flavor and odor is mild and pleasant; cook before eating.