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Species Information
Summary: Features include a rusty reddish brown pore surface growing flat on wood, and microscopic characters including setae in the hymenium and setal hyphae in the context. The description is derived from Gilbertson(1) except where specified.
Fuscoporia ferruginosa has been found in BC, WA, OR, ID, AB, MB, NT, NB, NF, NS, ON, SK, YT, AK, AL, AZ, CA, CO, KY, LA, ME, MN, MO, MT, NC, NM, NY, OH, PA, TN, VA, and WV, (Gilbertson), and it occurs in Europe and Asia, (Breitenbach).
Cap: becoming widely spread out, growing flat on wood, "tough to soft-spongy, not easily separable"; margin up to 2cm wide, soft-spongy, tawny, often appearing under a hand lens to have setae
Flesh: up to 0.15cm thick, soft-fibrous; azonate, yellowish brown
Pores: "usually 7-9 per mm, but in some unusual specimens 2-3 per mm", circular, with thick tomentose walls; ferruginous; tube layer up to 2cm thick, slightly darker than the flesh or the same color, continuous with the flesh
Odor: indistinct (Buczacki)
Taste: indistinct (Buczacki)
Microscopic: spores 5-7 x 3-3.5 microns, cylindric or short-oblong, smooth, inamyloid; basidia 4-spored, 11-14 x 4.5-6.5 microns, clavate, simple-septate at base; setae abundant, 25-65 x 6-8 microns, mostly subulate [awl-shaped], brown in KOH, thick-walled; hyphae of context of 2 types: 1) 2-4 microns wide, light brown in KOH, rather thin-walled, with rare branching, 2) setal hyphae 5-8 microns wide, darker reddish brown, very thick-walled, tapering to a seta-like point, unbranched, hyphae of trama similar to thin-walled type, (Gilbertson), spores 4.5-5.5 x 3-3.5 microns, elliptic, smooth, inamyloid, colorless, sometimes with droplets; setae in the hymenium 20-40 x 6-7 microns, dark brown, setae in trama 3-6 microns wide and up to 100 microns long, light brown, setae in mycelium up to 500 microns long and 10 microns wide, dark brown, thick-walled, almost without a lumen, (Breitenbach for Phellinus ferruginosus (Schrad.: Fr.) Pat.)
Spore Deposit: white (Buczacki)
Habitat / Range
annual, on dead wood of hardwoods and conifers, causing a white laminated rot, (Gilbertson), all year (Buczacki)
Similar Species
Fuscoporia ferrea has narrow spores and lacks setal hyphae, (Gilbertson). Fuscoporia ferrea has a yellowish brown pore surface, narrower spores (2.0-2.5 microns wide), and shorter setae (25-45 microns long), and it lacks setal hyphae, (Ginns). Phellinidium weirii and Phellinidium ferrugineofuscum have setal hyphae but they occur in the tramal tissue and project into the tubes, (Gilbertson). Fomitiporia punctata has beaked cystidioles but no setae, (Breitenbach).
Gilbertson(1) (as Phellinus ferruginosus), Ginns(28)*, Phillips(1)* (who describes Phellinus ferruginosus (Fr.) Pat. with more than one tube layer and growing on hardwoods), Breitenbach(2)* (describing Phellinus ferruginosus (Schrad.: Fr.) Pat.), Buczacki(1)* References for the fungi
