E-Flora BC: Electronic Atlas of the Flora of British Columbia

Polyporus elegans Bull.: Fr.
elegant polypore
Polyporaceae

Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.

Introduction to the Macrofungi

© Curtis Bjork  Email the photographer   (Photo ID #25090)

E-Flora BC Static Map
Distribution of Polyporus elegans
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Species Information

Summary:
features include tough thin circular tan to chestnut brown cap that becomes depressed, small pale buff pores, central to lateral stem that is brown at top and black at base, and microscopic characters including generative hyphae with clamp connections; the species has been regarded as a synonym of Polyporus varius, but the online Index Fungorum, accessed September 8 synonymizes it with Polyporus leptocephalus (Jacq.) Fr.; found in BC, WA, OR, ID, also AB, MB, NS, ON, PQ, YT, AK, AL, AR, AZ, CA, CO, CT, DE, GA, IA, KY, MA, ME, MI, MN, MT, NC, ND, NE, NH, NJ, NY, OH, PA, TN, UT, VA, VT, WI, WV, WY, (Gilbertson)
Cap:
1-4(9)cm across and 1cm thick (usually 0.2-0.3cm thick), circular to kidney-shaped or fan-shaped; tan to chestnut brown, not zoned; bald, (Gilbertson), 1.5-7cm, round to kidney-shaped, convex becoming depressed or umbilicate; pale tan to ocher, often weathering to white; smooth or finely striate; margin often wavy or lobed, (Arora)
Flesh:
up to 0.7cm thick, corky, not zoned; pale buff, (Gilbertson), thin, tough when fresh, rigid when dry; white to pale cinnamon, (Arora)
Pores:
5-7 per mm, circular to angular; pale buff; tube layer up to 0.2cm thick, colored as flesh or slightly darker, (Gilbertson), 4-6 per mm, usually decurrent; white when fresh, often grayish or brownish when old; tube layer thin, (Arora)
Stem:
up to 7cm x 0.5cm, central or lateral; base black, upper part colored as cap, bald, (Gilbertson), 0.5-5cm x 0.2-0.6(1)cm, central to lateral, tough, "more or less equal or swollen at base"; pallid or tan in upper part, soon black in lower part, (Arora)
Microscopic:
spores 7.5-10 x 2.5-3 microns, cylindric, slightly curved, smooth, inamyloid, colorless; basidia 4-spored, 15-20 x 6-7 microns, broadly clavate, with basal clamp; cystidia none; hyphae dimitic, generative hyphae of context 2.5-4 microns wide, thin-walled, with clamp connections, binding hyphae of context 2.5-5 microns, thick-walled, nonseptate, much branched; hyphae of trama similar, (Gilbertson), spores 6.5-10 x 2.5-4 microns, cylindric, smooth, (Arora)
Spore Deposit:
white (Arora)

Habitat / Range

annual, usually single, on dead hardwoods, occasionally on conifers, associated with white rot of dead hardwoods, (Gilbertson), single or several together "on decaying hardwood sticks, branches and debris (only rarely on conifers)", (Arora)

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links

Edibility

too tough (Arora)

Additional Photo Sources

Related Databases

Species References

Gilbertson(1), Arora(1)*

References for the fungi

General References