Scientific name: Polyporus brumalis (Pers.) Fr.
Derivation of name: Polyporus means "many pores";
brumalis means "winter" referring to its appearance in cool
seasons of the year.
Synonymy: Boletus brumalis Pers.; Polyporus brumalis
Pers. ex Fries
Common names: Winter polypore.
Occurrence on wood substrate: Saprobic; solitary or
on decaying deciduous wood; October through
Dimensions: Caps 1.5-10 cm wide; stipes 2.5-5 cm long
1.5-5 mm thick, colored like the cap or paler.
Upper surface: Yellow-brown to dark brown or nearly
Pore surface: Whitish; pores somewhat angular; pores 2-3
Comments: Compare to P. arcularius which has a paler,
cap with a fringed margin and larger pores.
More information at MushroomExpert.com:
Figure 1. Note the intensely dark cap surface and white pore
surface. Photo © Steve Nelsen.
Figure 2. Cap and pore surfaces. Photo © Steve Nelsen.
Figure 3. Specimens collected
during the 2003 NEMF foray.
Photo © Gary Emberger.