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Page number:92 
Description type:Non-original description 
Description:Poria alutacea Lowe Fig. 73 Mycologia 38:202. 1946 (FH; BPI; K; MICH; NY; NYS; PC; UPS; S; SYRF). Poria calcea µm coriacea f. radicata Bourd. & Galz., Soc. Mycol. France Bul. 41:233. 1925.
Annual, effused, up to 1 mm thick, readily separable, without distinctive taste; margin white, matted-mycelioid, narrow to wide, usually with well-developed slender rhizomorphs; pore surface white to pale cream, usually glancing, the tubes corky when dry, up to 1 mm long, pores rounded to angular, about 5-6 per mm, edges becoming moderately thin, entire to fimbriate; context white, firm, thin, continuing without change into the trama.
Tissue unchanged in KOH; hyphal system dimitic, the context principally of skeletal hyphae which are rarely branched, sometimes incrusted, thick-walled to solid, nonseptate, 1.5-2.5 µm in diameter, the generative hyphae rare, more abundant in the marginal tissue, thin-walled, rarely branched, occasionally nodose-septate, 2-3 µm in diameter; tramal tissue continuous with the context and the hyphae similar; hymenium 9-14 µm thick; hyphal pegs infrequent; cystidioles mostly immersed, bluntly pointed, 4-5 µm in diameter; basidia clavate, 9-12 x 4-5 µm; spores hyaline, smooth, IKI -, short-cylindrical, straight to slightly curved, 2.5-3.5 x 1-1.5 µm.
On angiosperms and gymnosperms in Ont., N.Y., Va., N.C., S.C., Tenn., Miss., Ark., Ind., Idaho, Mont., Wash., and Ore., in Europe and recorded from N. Zealand; associated rot white. Poria fimbriatella is very similar externally, but differs in having large cystidia, pores 4 per mm, and spores oval to subglobose, 2.5-3 x 2-2.5 µm. This was distributed in M. A. Libert, Pl. Crypt. Arduennae Fasc. IV, No. 321. 1837, as "Polyporus vaillantii DC."
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