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

Polyporus varius Fr.
no common name
Polyporaceae

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

Introduction to the Macrofungi

© Kit Scates-Barnhart  Email the photographer   (Photo ID #19050)

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

Summary:
features include tough thin circular pale buff cap that has darker radial striations, and that becomes depressed, small pale buff pores, central to lateral black stem, and microscopic characters including generative hyphae with clamp connections; description derived from Gilbertson(1); found in BC, WA, OR, ID, also AB, MB, NT, NB, NS, ON, YT, AK, AZ, CA, CO, IA, MA, MI, MN, MO, MT, NC, NH, NM, NY, TN, UT, VT, WV, WY, (Gilbertson)
Cap:
up to 8cm across and 0.4cm thick, dimidiate [roughly semicircular] to circular, sometimes fan-shaped or funnel-shaped, single or several from a branched base; pale buff with radially aligned darker striations, not zoned; bald
Flesh:
up to 0.2cm thick, corky, not zoned; buff
Pores:
7-9 per mm, circular to angular, usually decurrent down to black part of stem; pale buff; tube layer colored as flesh
Stem:
up to 2cm x 0.7cm, central to lateral; black; minutely tomentose at the base
Microscopic:
spores 9-12 x 2.5-3 microns, cylindric, slightly curved, smooth, inamyloid, colorless; basidia 4-spored, 18-30 x 7-9 microns, clavate, with basal clamp; cystidia absent, cystidioles 18-23 x 5-7 microns, fusoid; hyphae dimitic, generative hyphae of context 2.5-4 microns wide, difficult to find in mature specimens, thin-walled, with clamp connections, skeletal hyphae of context 4-5 microns wide, thick-walled, nonseptate, binding hyphae of context 1.5-4 microns wide, thick-walled, nonseptate, much branched; hyphae of trama similar

Habitat / Range

annual, on dead wood of hardwoods and conifers, associated with a white rot

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links

Additional Photo Sources

Related Databases

Species References

Gilbertson(1), Phillips(1)* (who treats P. elegans as synonym), Breitenbach(2)*

References for the fungi

General References