Fomitella supina (Sw.) Murrill 1905

Fomes rubritinctus Murrill, Bull. Torrey
Club 30: 232. 1903.
A large perennial plant of many layers, the upper partly dead and discolored, the lower smooth, light-colored and anoderm, with large "pores, which become dark-red when bruised. Pileus corky to woody, dimidiate, convex, 4-12 X 5-15 X 3-10 cm.; surface anoderm, smooth, velvety to the touch, white or pallid, becoming dark-brown and roughened with age ; margin obtuse, sterile, concolorous : context corky, becoming woody, pallid, 1.5 cm. thick; tubes unevenly stratified, the layers separated by unusually thick cushions of context, 0.5-1 cm. long each season, 2 to a mm., isabelline within, becoming umbrinous in the older layers, mouths subcircular or polygonal, edges thin, isabelline, becoming dark-red when bruised: spores ovoid to globose, 5-7/^ long, smooth, hyaline, wall of medium thickness ; hyphae hyaline.
Type locality : Nicaragua.
Habitat: Dead trunks.
Distribution : Known only from the type locality.

Fomitopsis supina is a species of fungus in the family Fomitopsidaceae. It is a plant pathogen that affects avocados.