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Species Information
Summary: {See also Trametes versicolor and similar polypores Table.} Features include 1) a leathery to rigid, bracket-like or shelf-like fruitbody that is hairy and colored various brown shades (often grayish with a brown margin), the surface concentrically grooved or zoned but the zones not sharply contrasting in color, 2) whitish to brownish or grayish pores, and 3) duplex flesh.
Trametes hirsuta has been found in BC, WA, OR, ID, AB, MB, NB, NF, NS, ON, PQ, SK, AK, AL, AR, AZ, CA, CO, CT, FL, GA, IA, IL, IN, KS, KY, LA, MA, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NM, NY, OH, OK, PA, SC, SD, TN, TX, UT, VA, VT, WI, WV, and WY, (Gilbertson).
Cap: 2.5-15(30)cm broad, shelf-like or bracket-like, fan-shaped to nearly circular in outline, "tough and leathery when fresh, fairly rigid when dry", "whitish to grayish, yellowish, dull ochre, buff, beige, or pale brownish", or surface may be greenish from algae; dry, densely hairy to coarsely velvety, "usually concentrically zoned or grooved, but the colors of each zone dull and not sharply contrasting"; margin often wavy, (Arora), bracket-like, or bent outward from flat pore surface forming shelf-like cap, to rarely entirely flat on wood with pore surface exposed, dimidiate [roughly semicircular], applanate [flattened horizontally] to thick; coriaceous [leathery] when fresh; gray, margin often yellowish brown; hirsute [hairy], zoned or concentrically grooved, margin often tomentose, (Gilbertson), with alternating hispid-hirsute and pilose-tomentose zones, (Breitenbach)
Flesh: 0.1-0.5cm thick, tough; white (or pale brownish to yellowish when old), (Arora), duplex, the upper part up to 0.3cm thick, soft-fibrous, gray, the lower part up to 1.5cm thick, corky, ivory white, at least at base the two layers separated by a thin black line, (Gilbertson)
Pores: (1)2-4 per mm, "white to dingy yellowish or buff when fresh, often tinged brownish or gray in age"; tube layer 0.1-0.3(0.5)cm thick, (Arora), (1)3-4 per mm, circular to angular, walls thick becoming thin when old; "white to tan or cinereous"; tube layer up to 0.6cm thick, colored as lower flesh, (Gilbertson)
Stem: usually absent
Odor: slightly anise-like (Breitenbach)
Taste: somewhat bitter (Breitenbach)
Microscopic: spores 6-9 x 2-2.5 microns, cylindric, smooth, inamyloid, colorless; basidia 4-spored, 15-19.5 x 5-7 microns, clavate, with basal clamp; cystidia absent, hyphal pegs occasionally present; hyphae trimitic, generative hyphae of context 2.5-6 microns wide, thin-walled, with clamp connections, skeletal hyphae of context 3-7 microns wide, colorless, thick-walled, often sinuous, nonseptate, with rare branching, binding hyphae of context 2-4 microns wide, "thick-walled, nonseptate, much branched"; hyphae of trama similar, (Gilbertson), spores 4.5-7.5 x 1.5-3 microns, cylindric to sausage-shaped, smooth, (Arora)
Spore Deposit: whitish or pallid (Arora)
Habitat / Range
annual, single or "more often in groups, fused rows, or overlapping clusters on dead hardwoods (or occasionally conifers)", (Arora), annual, on dead hardwood, rarely on conifer wood, associated with a white rot of hardwoods, (Gilbertson), all year (Buczacki)
Similar Species
Trametes versicolor is more brightly colored and less hairy, and tends to be smaller, (Arora). T. versicolor is thinner-fleshed and finely velvety but not hirsute (Breitenbach). T. versicolor is usually more obviously zoned, (Trudell). Trametes pubescens is usually snow-white, thin-fleshed, and without colored zones, (Breitenbach). T. pubescens has flesh that is not duplex (Trudell). T. pubescens and Trametes ochracea "are tomentose with pale margins" (Ginns). See also SIMILAR section of Coriolopsis trogii and Oxyporus cuneatus.
