Summary:
Features include 1) resupinate growth on wood, 2) somewhat waxy fruitbodies with mature color creamy to ochraceous yellow, often with patches of dull rose, the surface smooth, and the margin not especially differentiated, 3) spores that are cylindric to slightly concave on one side, smooth, and inamyloid, with numerous oil droplets, 4) projecting cylindric cystidia with homogeneous contents, and 5) a monomitic hyphal system, the hyphae with clamp connections.

Microscopic:
SPORES usually 9-12 x 3-4 microns, cylindric: usually straight but one side often slightly concave, smooth, inamyloid, thin-walled, with numerous oil droplets; BASIDIA 4-spored, 25-30(35) x 6-8 microns, clavate to nearly cylindric, often constricted, oildrops in protoplasm, with basal clamp connection; CYSTIDIA "varying in number but usually found without difficulty", projecting slightly, 50-130 x 6-8 microns, "thin-walled, tubular, sometimes sinuous and somewhat constricted", "as a rule non-septate and with homogeneous contents"; HYPHAE monomitic: hyphae 3-4 microns wide, richly branched, thin-walled, with clamp connections at all septa, loosely arranged near the substrate, "densely united in the thickening subhymenium, which is composed of mainly vertical hyphae", (Eriksson)

Notes:
Hyphoderma roseocremeum has been found in BC, NS, PQ, AZ, NC, and VA, (Ginns), and Denmark and Sweden, (Eriksson). The University of California Berkeley has a collection from Okanagan Similkameen, BC, and O. Ceska found it on Vancouver Island in BC