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Page number:114 
Remarks (internal):sensu lato 
Description type:Non-original description 
Description:Poria radula (Pers. ex Fries) Cooke Fig. 100 Grevillea 14:111. 1886; Bres., Accad. Rover. Agiati Atti 3(3):87. 1897 (lectotype-S; BPI; NY; SYRF). Polyporus radula Pets. ex Fries, Syst. Myc. 1:383. 1821. Boletus (Poria) radula Pers., Obs. Myc. 2:14. 1799. Poria eupora var. subfimbriata Rom., Sv. Bot. Tidskr. 20:16. 1926 (S).
Annual, effused, up to 1 mm thick, separable, without distinctive odor or taste; margin pale cream, matted, narrow to wide and sometimes conspicuous, with rhizomorphs which are sometimes conspicuous; pore surface pinkish-tan, dull, the tubes coriaceous, up to 1 mm long, pores often markedly sinuous, about 2-4 per mm, edges becoming thin, entire to lacerate; context pale cream, firm, up to 0.8 mm thick; trama quickly becoming translucent and much firmer than context.
Tissue not changing color in KOH; hyphal system dimitic, the context of generative hyphae which are rarely' branched, sometimes incrusted, thin
walled, nodose-septate and rarely with simple septa as well, 3.5-6 µm; in diameter, and skeletal hyphae which are thin- to thick-walled, rarely to occasionally branched, nonseptate, 1.5-3 µm in diameter; tramal tissue continuous with the context, the hyphae as in the context except the skeletal hyphae predominating and 1.5-2.5 µm in diameter; hymenium 14-17 N thick; cystidia infrequent to rare, heavily incrusted, downwardly projecting as much as 2 5 µm into the pore space, up to 3 5 ("-60" (Bresadola) ) µm; long, and -25 µm in diameter; basidia clavate, 10-14 x 4-6 µm; spores hyaline, smooth, IKI -, oval or ovoid to subglobose, 3-4.5 x 2-3 µm.
On angiosperms in Ont., N. Y., Wyo., Colo. and in Europe; associated rot uncertain, probably white.
The concept here is that of Bresadola. Poria eupora is similar but differs primarily in lacking rhizomorphs. P. rixosa is also similar but it has cylindrical spores. The specific name "radula" has often been applied to the plant called Poria versipora in this manual, and the discussion by Donk (1933, pp. 224-227) gives an adequate idea of the taxonomic muddle involved in the use of this specific name.
A specimen collected by Kmet and reported by Bresadola as cited is selected as lectotype. It should be noted the spore measurement given by Bresadola was in error; Bresadola corrected it to 3-4 x 3 µm.
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