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Species Information
Summary: Features include pale orange to rust-colored bracket-like to shelf-like fruitbodies that are tomentose or bald becoming bristly or radially fibrillose, often zoned, and pale orange pores and flesh that turn red with KOH. The description is derived from Gilbertson(1) except where noted.
Pycnoporellus fulgens has been found in BC, WA, OR, ID, also AB, MB, NF, NS, ON, PQ, PE, AK, CA, CO, MA, ME, MI, MN, MT, NH, NY, PA, VT, WI, and WV, (Gilbertson).
Cap: up to 6cm x 9cm x 2.5cm, bracket-like or bent outward from pore surface flat on wood to form shelf-like cap, dimidiate [roughly semicircular] to long and narrow; "pale orange to rust-colored"; tomentose or bald when young to hispid [bristly] or radially fibrillose when old, often zoned
Flesh: up to 0.5cm thick, sometimes duplex: lower layer firm and corky and upper layer soft and fibrous; light orange
Pores: 2-3 per mm, circular to angular, walls thin becoming torn when old; pale orange; tube layer up to 0.6cm thick, colored as flesh or sometimes paler orange
Chemical Reactions: flesh and tubes red with KOH
Microscopic: spores 6-7(9) x 2.5-4 microns, short-cylindric to oblong, smooth, inamyloid, colorless; basidia 4-spored, 25-30 x 5-5.5 microns, clavate, simple-septate at base; cystidia frequent, 45-60 x 4-6 microns, projecting up to 35 microns, narrowly cylindric, simple-septate at base; hyphae monomitic, hyphae of context of 2 types: 1) 4-9 microns wide, "pale reddish to brownish in KOH, mostly very thick-walled, with occasional branching, simple-septate", with a very narrow, sinuous lumen, 2) 2.5-4 microns wide, colorless in KOH, thin-walled to moderately thick-walled, with frequent branching, simple-septate
Habitat / Range
annual, single or imbricate [shingled], "mainly on conifer logs and slash but also occasionally on hardwoods", associated with brown cubical rot of dead conifers and hardwoods, (Gilbertson), in a Haida Gwaii study, Kroeger(5) found that it was almost invariably associated with old fruitbodies of Fomitopsis pinicola complex, on some cases on the fruitbodies themselves
Similar Species
Pycnoporellus alboluteus generally grows flat on the wood surface, or may be slightly bent outwards to form cap, and microscopically has larger pores, spores and cystidia, (Gilbertson). P. alboluteus has fruitbodies that are typically spread out on the substrate, sometimes bent outward to form a slight cap, larger pores that are typically greater than 0.1cm in diameter, larger spores 9-14 microns long, and larger cystidia measuring 60-120 x 5-10 microns, (Ginns).
