Gloeoporus dichrous

Scientific name:   Gloeoporus dichrous (Fr.) Bres.
Derivation of name:   Gloeoporus means "a glutinous or
sticky polypore"; dichrous means "two colors" in reference
to the two distinct colors of the cap and pore surface.
Synonymy:   Polyporus dichrous Fr.; Caloporus dichrous
(Fr.) Ryv.
Common names:   Gelatinous-pored polypore.
Phylum:   Basidiomycota
Order:   Polyporales
Family:   Meruliaceae
Occurrence on wood substrate:  Saprobic; often effused-
reflexed, spreading over considerable areas in overlapping
clusters; August through October, overwinters.  
Dimensions:  Caps 0.5-5 cm wide; up to 10 cm long; up to
5 mm thick.   
Upper surface:  White; dry; hairy to velvety.
Pore surface: Rubbery-gelatinous, separable; pale reddish
to purplish-brown; pores 4-6 per mm.
Edibility: Inedible.
Comments:  A truly distinct feature of this fungus is that the
pore surface is elastic and separable from the underlying cap
tissue.

More information at RogersMushrooms.com:   


Figure 1. White caps of Gloeoporus dichrous growing on a
log just above water.
    

Figure 2. Top and bottom surfaces of specimens of Figure 1.

Figure 3. The pore surfaces of these specimens is more
purplish-brown than the pale reddish color of some
specimens. Photo © Larry Grand.

Figure 4. The pore surface of Gelatinous-pored polypore.

Figure 5. The forceps on the right are pulling the gelatinous
pore layer away from the cap context. It is very unusual
for a pore layer to be separable and elastic in this manner.