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.

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)

Notes:
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).

Synonyms and Alternate Names:
Sarcosoma latahense Paden & Tylutki