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Summary: Trametes versicolor forms thin leathery bracket-like or shelf-like clustered caps that are strongly zoned with narrow concentric bands of contrasting colors, hairy zones usually alternating with silky-smooth ones. It is very common on hardwood logs, stumps and branches. It is found in BC, WA, OR, ID, and also AB, MB, NB, NF, NS, ON, PE, PQ, SK, YT, AK, AL, AR, AZ, CA, CO, CT, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NY, OH, OK, PA, SC, SD, TN, TX, UT, VA, VT, WI, WV, and WY, (Gilbertson)
Cap: 2-7(10)cm broad, shelf-like or bracket-like, tongue-shaped becoming fan-shaped, or growing in circular rosettes, "thin and leathery when fresh, rigid or slightly flexible when dry", flat or wavy; color "variable: a mixture of white, gray, brown, yellowish-buff, bluish, reddish, or black (or even greenish from a coating of algae), or sometimes dark brown with a white margin"; dry, velvety or silky, strongly zoned with narrow concentric bands of contrasting colors, hairy zones usually alternating with silky-smooth ones; "margin often wavy and white or creamy when actively growing", (Arora), bracket-like or bent outward to form shelf-like cap from pore surface growing flat on wood, dimidiate [roughly semicircular]; very variable in color, "with sharply contrasted concentric zones of various shades of brown, buff, reddish-brown or bluish colors"; hirsute [hairy] to tomentose, (Gilbertson)
Flesh: 0.1-0.2cm thick, tough; white, (Arora), up to 0.5cm thick, "tough-fibrous, with a thin black layer below the surface tomentum"; cream-colored, (Gilbertson)
Pores: 3-5 per mm, white to dingy yellowish; tube layer up to 0.2cm thick, (Arora),4-5 per mm, angular to circular, thick-walled; cream to cinereous; tube layer up to 0.3cm thick, colored as flesh and continuous with it, (Gilbertson)
Stem: absent or rudimentary (Arora)
Odor: not distinctive (Phillips)
Taste: not distinctive (Phillips)
Microscopic: spores 5-6 x 1.5-2 microns, cylindric, slightly curved, smooth, inamyloid, colorless; basidia 4-spored, 15-20 x 4-5 microns, clavate, with basal clamp; cystidia absent; hyphae trimitic, generative hyphae of context 2.5-3 microns wide, "thin-walled, with clamps", skeletal hyphae of context 4-6 microns wide, "thick-walled, nonseptate", binding hyphae of context 2-4 microns wide, "thick-walled, nonseptate, much branched"; hyphae of trama similar, (Gilbertson), spores 4-6 x 1.5-2.5 microns, (Arora)
Spore Deposit: white or yellowish (Arora)
Habitat / Range
typically "in groups, rows, tiers, shelving masses, or overlapping clusters on logs, stumps, and fallen branches of dead hardwoods", "sometimes also on wounds in living trees and rarely on conifers", (Arora), annual, often in large imbricate [shingled] clusters on dead wood of numerous genera of hardwoods, associated with a white rot of dead hardwoods, (Gilbertson), fruiting from late spring to fall (Miller), may be seen year round (Buczacki)
Trametes hirsuta is less brightly colored and more hairy, and tends to be larger, (Arora). T. hirsuta is usually less obviously zoned, (Trudell). Trametes ochracea is paler and less zoned, has a rigid hard consistency (not thin and flexible), lacks the black layer in the context, and has slightly larger pores and spores, (Gilbertson). Stereum species may look somewhat similar, but a hand lens does not reveal pores.
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2017. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
18/08/2019 2:00:00 AM
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