Summary:
Features include flat growth on wood with pore surface exposed, tough-corky consistency, cream to bright yellow pore surface with pores round to angular, 3-5 per mm, and microscopic characters including inamyloid spores and dimitic hyphal system with amyloid skeletal hyphae. Perenniporia narymica differs from other Perenniporia species in the Pacific Northwest which have a trimitic hyphal system. The online Species Fungorum, accessed September 4, 2018, gave the current name as Yuchengia narymica (Pilat) B.K. Cui, C.L. Zhao & K.T. Steffen, in Zhao, Cui & Steffen, Nordic Jl Bot. 31(3): 333 (2013), but MycoBank, accessed the same day, give the latter as a synonym of Perenniporia narymica (Pilat) Pouzar.

Microscopic:
spores 4.5-6 x 3-4 microns, elliptic to oval, inamyloid, thick-walled; cystidioles 14-20 x 5-7 microns, fusoid, not projecting; hyphal system dimitic: generative hyphae 2-4 microns wide, thin-walled, and skeletal hyphae 3-6 microns wide, thick-walled, walls faintly amyloid, binding hyphae absent, (Ginns), spores 4.5-6 x 3-4 microns, elliptic to oval, smooth, inamyloid, colorless; basidia 4-spored, 18-30 x 6-9 microns, clavate with basal clamp connection; cystidia none; fusoid cystidioles 14-20 x 5-7 microns, not projecting, with basal clamp connection; hyphal system dimitic, subicular generative hyphae 2-4 microns wide, thin-walled, with clamp connections; subicular skeletal hyphae 3-6 microns wide, thick-walled, with rare branching, weakly amyloid, nonseptate, (Gilbertson)

Notes:
Perenniporia narymica has been found in BC (Victoria area) according to Ginns(28). It is also found in AZ and the northeastern United States including MI, MN, NY, and PA, (Gilbertson(1)).

Synonyms and Alternate Names:
Phlebia cinnabarina Schwein.
Phlebia merismoides (Fr.) Fr.