Rusty Porecrust

Fuscoporia ferruginosa (Schrad.) Murrill
Boletus ferruginosus Sch.rQ.d. Spic. Fl. Germ. 172. 1794.
Effused, inseparable, irregular, coriaceous to rigid, 1-3 mm. thick; margin thin, adnate, usually determinate, entire to undulate, tomentose, sterile, ferruginous : context conspicuous, ferruginous ; hymenium plane or uneven, often oblique, sometimes imbricateundulate, bright-ferruginous, becoming ferruginous-fuscous with age ; tubes whitish-stuffed, ferruginous to fuscous within, mouths variable, irregular, subcircular, averaging about 4 to a mm., edges thin, more or less dentate: spores obovate-oblong, smooth, hyaline, 1-guttulate, 5X3^; hyphae flavous, 2-3 j«; cystidia fulvous, cuspidate, ventricose at the base, abundant, 35^5 X 6-8 /i.
Type locality: Germany. Habitat: Dead deciduous wood. Distribution: North America ; also in Europe.

Phellinus ferruginosus is a plant pathogen. It is inedible.