Summary:
Features include 1) resupinate growth on conifers, less often on hardwoods, 2) a somewhat waxy fruitbody that is cream to yellow, and smooth, the margin well demarcated and undifferentiated, 3) spores that are elliptic, smooth, and inamyloid, with a minute apiculus, 4) hyphidia that are abundant to rare, sometimes subacuminate, often nodulose, occasionally forked, or with prongs, and 5) hyphae that are thin-walled to slightly thick-walled, with clamp connections.

Microscopic:
SPORES 7-9 x 4.5-7 microns, ovoid, slightly compressed laterally, smooth, inamyloid, colorless, thin-walled, with minute apiculus; BASIDIA 4-spored, 40-50 x 7-8 microns, clavate, somewhat flexuous [wavy], sterigmata 7.5-8.5 microns long, subulate [awl-shaped], nearly straight; PARAPHYSES abundant, hypha-like, "sometimes subacuminate, often nodulose, occasionally furcate, or with stout prongs"; SUBICULUM "not sharply differentiated into layers, basal horizontal portion of hyphae with thickened, highly refractive, somewhat gelatinized walls from which arises an indistinctly stratose portion of vertical hyphae that ultimately form the hymenium"; upright hyphae 1.5-3 microns wide, thin-walled, with clamp connections, "interwoven with granular-appearing collapsed hyphae", (Jackson), SPORES 8-9 x 5-6 microns; BASIDIA 30-65 x 6.5-8 microns, stemmed-clavate; HYPHIDIA 1.5-2.5 microns wide, sometimes rare; HYPHAE (1.5)2-4 microns, thin-walled to slightly thick-walled, with clamp connections, (Julich)

Notes:
Radulomyces notabilis has been found in BC, AB, MB, NF, NS, ON, CA, CT, MI, and MN, (Ginns), as well as Europe (Julich).