Fuscoporia gilva

Scientific name: Fuscoporia gilva (Schwein.) T. Wagner
& M. Fisch. 
Derivation of name:  Phellinus means "made of cork" or
"corky"; gilva means "pale yellow."
Synonymy: Phellinus gilvus (Schwein.) Pat.;
Polyporus gilvus (Schw.) Fr.
Common names:   Mustard yellow polypore.
Phylum:   Basidiomycota
Order:   Hymenochaetales
Family:   Hymenochaetaceae
Occurrence on wood substrate:  Saprobic; solitary or in
overlapping clusters or rows on dead deciduous wood;
sometimes on conifer wood; year-round.  
Dimensions: Caps up to 15 cm wide and 2.5 cm thick.    
Upper surface: Ochre to bright rust yellow or reddish brown
at first, darker (blackish) with age; margin often yellowish;
velvety and rough at first, becoming smoother in age; zonate
or not.
Pore surface: Grayish-brown to reddish or purplish-brown;
pores 6-8 per mm.
Comments: Fuscoporia gilva is often an annual species
but may survive for several years under good conditions.

More information at MushroomExpert.com


Figure 1. Brownish cap and yellow margin of this
specimen of Fuscoporia gilva. Photo © Larry Grand.

Figure 2. The cap coloration is more uniform on these older
specimens. The dark pore surface of the specimen on the
right is typical of the species. Photo © Gary Emberger.