E-Flora BC: Electronic Atlas of the Flora of British Columbia

Summary:
Features include 1) resupinate growth on hardwoods, 2) fruitbodies that are honey-yellow to russet, the surface appearing powdery and the margin thinning out, 3) spores measuring 6-8 x 5.5-7 microns, smooth, and colorless, 4) microscopic composition that is very densely arranged, with nearly erect, interwoven hyphae about 2 microns in diameter, 5) gloeocystidia that are flexuous [wavy] and start from the substrate, and 6) numerous chlamydospores 5-6 microns in diameter.

Dichostereum effuscatum has been found in BC, WA, ID, NB, NF, NS, ON, PE, PQ, CT, DC, GA, IA, IL, KY, LA, MA, MD, ME, MI, MN, MO, NH, NJ, NY, OH, PA, TX, VA, and WI, (Ginns), although Castellano(1) says that it appears restricted to eastern North America: Burt lists BC, WA, and ID specimens and perhaps these identifications are disputed.

Fruiting body:
3-10cm long, 2-4cm wide, in section 0.02-0.05cm thick, broadly spread out, "rather thick, membranaceous, small pieces separable when moistened"; "honey-yellow to russet when fresh, fading to cream-buff in the herbarium"; even, pulverulent [powdery]; the margin thinning out, (Burt)

Microscopic:
SPORES 6-8 x 5.5-7 microns, (Castellano(1)), SPORES 6 microns in diameter, smooth, colorless; fruitbody "composed of very densely arranged, suberect, interwoven hyphae about 2 microns in diameter, gloeocystidia, and chlamydospores"; GLOEOCYSTIDIA 40-150 x 5-9 microns, starting from the substrate, flexuous; imbedded chlamydospores very numerous, 5-6 microns in diameter, round, sometimes comprising nearly the whole fruitbody, (Burt)