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.

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)

Notes:
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).

Synonyms and Alternate Names:
Monilia oregonensis Barss & Posey