Polyporus varius

Scientific name:   Polyporus varius (Pers.) Fr.
Derivation of name:   Polyporus means "many pores";
varius means "different" or "changing."
Synonymy:   Polyporus elegans Bull.: Fr.
Common names:   Elegant polypore.
Phylum:   Basidiomycota
Order:   Polyporales
Family:   Polyporaceae
Occurrence on wood substrate:  Saprobic; solitary to
scattered on dead deciduous wood, sometimes on conifers;
June through November.  
Dimensions:  Caps 1-12 cm wide; stipes 0.5-7.5 cm long
and 1.5-15 mm thick, central to lateral.   
Upper surface: Yellowish to ochre to tan; smooth; glabrous;
not zonate; sometimes with radial striations.
Pore surface: White to gray or yellowish; pores 4-5 per
Edibility: Inedible.
Comments: The black base of the stalk is an important
field character.

More information at MushroomExpert.com:   

Figure 1. A solitary specimen of Polyporus varius on a
fallen branch. Photo © Gary Emberger.

Figure 2. Scattered specimens of Polyporus varius on a
log. Photo © Gary Emberger.

Figure 3. Elegant polypore fruiting from the broken ends
of small branches. Photo © Gary Emberger.

Figure 4. Note the black stipe bases and different stipe
positions. Photo © Gary Emberger.

Figure 5. The black coloration at the base of the stipe
may be quite limited as in these specimens. Photo © Gary

Figure 6. This specimen has a radially striate cap. Not all
specimens have this trait. The presence or absence of
radial striations was used by some to help distinguish
between two species, P. varius and Polyporus elegans. I
have listed P. elegans as a synonym of P. varius on this
page. Photo © Gary Emberger.

Figure 7. Sectioned caps of Polyporus varius showing
the light tan colored context and the tube layer.
Photo © Gary Emberger.

Figure 8. The pore surface is decurrent to the black
portion of the stipe. Photo © Gary Emberger.

FIgure 9. Polyporus varius has tiny pores, 4-5 per mm.
Photo © Gary Emberger.

Figure 10. Specimens collected during a foray. The stipe is
just about lateral in one specimen and nearly central in the
other. Photo © Gary Emberger.

Figure 11. Collection of Polyporus varius at the 2008
NEMF foray in Connecticut. Photo © Gary Emberger.


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This page © 2008 by Gary Emberger, Messiah College