Summary:
Features include small annual, pendent fruitbodies growing in crevices of rotten conifer logs, the fruitbody cream to pale ochraceous, soft, and fragile, the pores white to cream, and microscopic characters including a monomitic hyphal system. The description is derived from Gilbertson(1) for Oligoporus minusculoides except where noted. Gilbertson mentions fusoid cystidioles but these were not found in the BC collection. In the BC collection, the generative hyphae were found to be dextrinoid en masse.

Microscopic:
spores 4.5-5.5 x 2-2.5 microns, oblong to short-cylindric, smooth, IKI-, colorless; basidia 4-spored, 25-36 x 5-6.5 microns, narrowly clavate, with basal clamp connection; cystidia none, fusoid cystidioles 22-35 x 5-6 microns, non-projecting, thin-walled, with basal clamp connection; hyphal system monomitic, context hyphae 3-5 microns wide, thin-walled, colorless, with clamp connections, rarely branched, tramal hyphae similar, (Gilbertson), spores (4.4)4.6-5.6 x (1.6)2.0 microns, cylindric, narrowly elliptic and suballantoid, smooth, inamyloid, colorless, thin-walled; basidia 4-spored, 15-23 x 4.5-5.0 microns, cylindric to narrowly clavate; cystidia and cystidioles lacking; generative hyphae 2-6 microns wide, with clamp connections, walls thin to 1.4 microns thick, dextrinoid en masse, (Ginns)

Notes:
Postia ceriflua has been found in WA, ON, NY, PA, TN, and Europe, (Gilbertson). In BC it is known from a single collection on Vancouver Island (Ginns(28)).

Synonyms and Alternate Names:
Inonotus radiatus (Sowerby: Fr.) P. Karst. Krit. Oefs.
Polyporus radiatus Sowerby: Fr.