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

Summary:
Features include 1) resupinate growth on wood and on plant debris, 2) inconspicuous fruitbodies that are soft, easily separated, cream to brownish, usually developing in small patches of mycelium, extending up to 5cm, the margin whitish with coarse hyphal strands, 3) long fusiform spores that are slightly to strongly curved at base, smooth, dextrinoid, and golden brown in KOH, 4) hyphidia the same length as the elongated basidia but even narrower, and 5) a monomitic hyphal system, the hyphae mostly without clamp connections, but some with single, double, or multiple clamp connections.

It has been found in in BC, WA, OR, NS, ON, AL, FL, MA, NH, NJ, NY, (Ginns).

Fruiting body:
annual, resupinate, extending up to 5cm across, usually developing in small patches of mycelium, soft and fragile, easily separated from wood; dingy cream at first, becoming brownish; smooth; margin white to cream colored, with coarse hyphal strands; subiculum composed of loosely interwoven hyphal strands, soft, (Gilbertson), effused, thin, soft, readily separable; drying from tawny olive to snuff brown; even, pulverulent [appearing powdery]; the margin mucedinous, pallid; in section 0.02-0.025cm thick, (Burt), spore deposit pale olive-brown (Buczacki)

Microscopic:
SPORES 15-17.5 x 5.5-7 microns, fusiform, slightly to strongly curved at base, smooth, dextrinoid, golden-brown in KOH, thick-walled; BASIDIA 2-4-spored, 90-110 microns long and 10-12 microns wide at widest point, elongated, cylindric, with narrowed base, large droplets in cytoplasm, no clamp connection at base; HYPHIDIA 90-110 x 3-5.5 microns, cylindric, thin-walled, not encrusted, without clamp connection at base, occasionally septate; HYPHAE monomitic, "hyphae of strands thin-walled, hyaline, mostly simple-septate, but some with single, double, or multiple clamps, the larger hyphae with multiple clamps up to 18 microns in diam, the others 4-7 microns in diam", SUBICULAR HYPHAE "mostly simple-septate, with occasional branching, thin-walled, hyaline, 3-9 microns in diam", (Gilbertson), SPORES 18-21 x 5-6 microns, fusiform, tapering at both ends, curved at the base, giving color to the fruitbody; CYSTIDIA none; the layer next to the substrate composed of hyphae 4-5 microns wide, loosely and longitudinally arranged, colorless, thin-walled, sometimes granule-encrusted, sometimes forming rope-like strands 20-25 microns wide, (Burt)