Fomitopsis pinicola

Scientific name:   Fomitopsis pinicola (Swartz:Fr.) Karst.
Derivation of name:   Fomitopsis means having the
appearance of Fomes; pinicola means "inhabiting pines."
Synonymy:   Fomes pinicola (Swartz ex Fries) Cooke,
Polyporus pinicola Swartz:Fr.
Common names:   Red-belted polypore.
Phylum:   Basidiomycota
Order:   Polyporales
Family:   Fomitopsidaceae
Occurrence on wood substrate:  Saprobic and parasitic;
solitary or in groups on decaying wood or living trees,
especially conifers; year-round. 
Dimensions:  Caps up to 45 cm wide.   
Upper surface:   Caps concentrically grooved; rusty-red
with a yellowish margin at first, becoming gray to reddish-
brown to blackish-brown or nearly black, often with a
sticky, resinous, reddish marginal band.
Pore surface: Creamy white at first, becoming brownish
in age; pores 4-5 per mm
Edibility: Inedible.
Comments: This perennial species has a thick, rounded
margin which is not always red, contrary to its common
name.
 
More information at RogersMushrooms.com:   

Figure 1. Red-belted polypore can be shelf or hoof-
shaped. These thick specimens give evidence of their
perennial nature. Photo © Larry Grand.

Figure 2. Note the gradation of color from the growing, thick
rounded margin to the older, blackish portions near the point
of attachment. Photo © Tom Sargis.

Figure 3. A specimen collected during a foray and displayed
on the collection tables.

Figure 4. A specimen with a classic red marginal belt.

Figure 5. Roody states that a match held next to
the resinous material on the margin will cause it to
melt.