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

Summary:
Features include 1) resupinate growth on wood, 2) a spore-bearing surface that is pale ochraceous, smooth, contrasting with the white subiculum, the subiculum continuing into a diffuse or rhizomorphic mycelium, 3) spores that are narrowly oval-elliptic-subfusiform, with an elongate apiculus, ornamented with hemispheric warts, walls somewhat thickened, both walls and warts cyanophilic, inamyloid, 4) basidia clavate with a stem-like part, and pleurobasidia frequent, and 5) a monomitic hyphal system, the hyphae with frequent ampullaceous swellings, and with clamp connections.

It has been found in BC, MB, NB, NS, ON, MI, and OH, (Ginns), as well as Austria, Finland, Poland, Sweden, and Tanzania, (Eriksson), and Colombia (Liberta).

Fruiting body:
resupinate, adnate [firmly attached], irregularly effused [spread out], of small to moderate size; spore-bearing surface "pale ochraceous, smooth, under the lens in the young state hypochnoid, then continuous, together with the subhymenium forming a layer, which is in the dry state fragile and easily separable from the white subiculum, this continuing into a diffuse or rhizomorphic mycelium"; margin not differentiated, (Eriksson), "effused, adnate, appearing hypochnoid under a lens", between ''pale luteous'' and ''ochreous''; margin "white, byssoid, fibrillose, or rhizomorphic", (Liberta)

Microscopic:
SPORES 5.5-8(9) x 3.3-3.9 microns, narrowly oval-elliptic-subfusiform, with elongate apiculus, ornamented with hemispheric or rarely conic warts, walls somewhat thickened, both walls and warts cyanophilic, inamyloid; BASIDIA 4-spored, 35-45 x 5-7 microns, clavate, flexuous-sinuose, basally narrowed to stem-like part, with basal clamp connection, pleurobasidia frequent especially in young hymenia; CYSTIDIA none; HYPHAE monomitic; "hyphae with clamps, 1.5-3 microns wide, thin-walled, straight and sparsely branched in the subiculum, densely branched and interwoven in the subhymenium, with branches from or opposite clamp connections as well as between septa; ampullaceous swellings frequent"; anastomoses usual, especially in the rhizomorphs, (Eriksson), SPORES 4.5-7.5(10) x 3.5-5.5 microns, oval-elliptic to fusiform-elliptic, regularly warted, inamyloid, thin-walled, yellowish to light ochraceous; BASIDIA 4-spored, 17-30(49) x 5-7(9) microns, "clavate, sometimes flexuous and slightly pedunculate", sterigmata 4-8 microns long; IN SECTION "up to 350 microns thick, monomitic, the basal context white, loosely arranged, the upper context concolorous with the hymenium, crystalline material scattered among the hyphae"; HYPHAE 1-3 microns wide, colorless, "thin-walled to slightly thick-walled (0.5 microns)", "with frequent ampulliform swellings at the clamp connection up to 9(12) microns wide", (Liberta)