Bjerkandera adusta

Scientific name:   Bjerkandera adusta (Willd.: Fr.) Karst.
Derivation of name:   Bjerkandera honors C. Bjerkander;
adust- means "scorched" or "appearing burned" in reference
to the dark pore surface.
Synonymy:   Polyporus adustus Willd.:Fr.
Common names:  Smoky polypore.
Phylum:   Basidiomycota
Order:   Polyporales
Family:   Hapalopilaceae
Occurrence on wood substrate:  Saprobic; forming
overlapping, stalkless caps on decaying deciduous wood,
sometimes conifer wood; July through November,
overwinters.  
Dimensions:  Caps 3-10 cm wide; 1-6 cm long; 0.1-0.8 cm
thick.  
Upper surface: Dirty white or gray or tan; hairy.        
Pore surface:  Pores minute (6-7 per mm); grayish, bruising
or aging darker.
Edibility: Inedible.
Comments: Compare to Bjerkandera fumosa. Caps of
Bjerkandera adusta are thinner and generally have a darker
pore surface.
 
More information at RogersMushrooms.com:   


Figure 1. The upper surface of this polypore is usually
whitish or tan and quite hairy.


Figure 2. The lower gray pore surface is quite striking.

Figure 3. Another specimen showing the gray pore surface
and some of the tan-colored cap surfaces. Photo © Tom
Volk.

Figure 4. The upper tan surface of Bjerkandera adusta
and the lower gray pore surfaces with whitish margins.
Photo © Larry Grand.

Figure 5. Note the dark bruising on the gray pore surfaces.
Photo © Dianna Smith.