Summary:
Features include 1) large semicircular, flattened fruitbodies without a stem 2) growth mostly on true fir (also hemlock and in eastern North America oak), 3) an upper surface that is bumpy, pitted, and whitish (buff) to darker brown, 4) a thick, rounded margin colored as the upper surface or ivory-colored, 5) yellowish brown to reddish brown mottled flesh, 6) a whitish (buff) to darker brown pore surface with a sheen that varies with incident light, 7) exudation of amber water droplets from the upper surface and pore surface when fresh, and 8) microscopic characters, including nearly round, colorless spores and strongly ventricose, hooked setae.

Chemical Reactions:
flesh black with KOH (Lincoff)

Odor:
intensely unpleasant (Breitenbach)

Taste:
mild, somewhat acidic, (Breitenbach)

Microscopic:
spores 6-8 x 5-7 microns, nearly round, smooth, dextrinoid, cyanophilous, colorless, becoming thick-walled; basidia 4-spored, 14-16 x 9-11, broadly clavate to ovoid; setae usually frequent, rare in some specimens, 25-40 x 9-16 microns, ventricose, usually hooked; context hyphae 5-14 microns, "varying from pale brown in KOH and thin-walled to dark brown and thick-walled, with occasional branching, simple-septate", with a gummy incrustation in some areas, trama hyphae 5-9 microns wide, thin-walled to moderately thick-walled, uniformly pale brownish, simple-septate, with rare branching, (Gilbertson), spores 7-8.5 x 6.5-8 microns, round, smooth; setae present, (Lincoff)

Spore Deposit:
yellow-white (Buczacki)

Notes:
Pseudoinonotus dryadeus has been found in BC, OR, AR, AZ, CA, GA, IL, IN, KY, LA, MD, MO, NC, NM, NY, OH, OK, PA, TN, TX, VA, and WV, (Gilbertson). It also occurs in Europe, Asia, (Breitenbach)