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Page number:117 
Remarks (public):This is a somewhat confusing species. All collections share the resupinate basidiocarps with very small pores, and the hyaline to pale yellow, ellipsoid basidiospores, 3.5-4.5 x 3-4 µm. The variable characteristic is the size of the setae. The characteristic pocket rot aids in the identification. 
Description type:Non-original description 
Description:Phellinus glaucescens (Petch) Ryvarden, Norw. J. Bot. 19:234, 1972. - Poria glaucescens Petch, Ann. Roy. Bot. Gard. Peradeniya 6:139, 1916.
Basidiocarps resupinate, effused, adnate, up to 1 cm thick, woody hard, margin narrow, rusty brown, velutinate (lens); pore surface fulvous to reddish brown, sometimes with an ashen tint especially when turned in incident light, pores small and entire, 6-8 per mm, tubes concolorous or dark cinnamon, indistinctly stratified, each layer up to 3 mm thick individually; context less than 1 mm thick, reddish to fulvous brown.
Hyphal system dimitic; generative hyphae simple-septate, hyaline to pale yellow, up to 4 µm wide; skeletal hyphae golden-yellow to pale rusty brown, unbranched, some with a rather wide lumen, in the context subsolid, 3-5 µm wide.
Hymenial setae scattered to frequent, straight, acuminate to slightly ventricose, 18-30 x 6-11 µm.
Basidia subglobose, 6-7 x 4-5 µm, with four sterigmata.
Basidiospores subglobose to ellipsoid, hyaline to pale yellowish with age and then slightly thick-walled, 3.5-4.5 x 3-4 µm.
Substrata. On hardwoods, causing a pocket rot.
Distribution. Palaeotropical species, in East Asia known from warm-temperate Japan (Kyushu), and North Thailand.
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