Kingdom: Fungi
Phylum: Basidiomycota
Class: Basidiomycetes
Order: Hymenochaetales
Family: Hymenochaetaceae
Genus: Inonotus

Shaped like a half circle disc forming a shelf (applanate) sometimes umbonate at the point of attachment, not zoned with concentric colored bands, very hispid aging glabrous when black;
Context lacking a granular central core, bruising brown when exposed;
Pores bruise brown when fresh;
Spores 8-11 × 6-9 um
Habitat: on oak fruiting from wounds or cankers, usually 5 – 15 off the ground.

Used to dye fabrics a yellowish color.

Bernicchia, Annarosa. 2005. Polyporaceae s.l. Fungi Europaei Vol. 10. Edizioni Candusso, Alassio, Italy. 806p.
Gilbertson, R. L. and L. Ryvarden. 1986. North American Polypores Vol. 1. Fungiflora, Oslo, Norway. 433p.
Gilbertson, R. L. and L. Ryvarden. 1987. North American Polypores Vol. II. Fungiflora, Oslo, Norway. 885p.
Overholts, L. O. 1967. The Polyporaceae of the United States, Alaska and Canada. Univ. of Michigan Press, Ann Arbor, Michigan. 466p.