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Page number:166 
Description type:Non-original description 
Description:Poria carbonacea (Berk. & Curt.) Cooke Fik. 155 Grevillea 14:113. 1886. Polyporus carbonaceus Berk. & Curt., Lin nean Soc. Bot. Jour. 10:317. 1868 (K; BPI; FH; S).
Annual, becoming widely effused, up to 10 mm thick, inseparable, taste none; margin cream at edge, darkening to tube color, radially fine-strigose at margin, velvety within, wide; pore surface pale grayish brown, in age becoming purplish black, dull, the tubes corky to rigid, up to 4 mm long, pores rounded or elongated and sinuous on inclined surfaces, 1-2 per mm, edges thin, fimbriate to more often incised and pore surface more or less hydnoid; context varying from pale brownish to purplish brown, softfibrous, up to 7 mm thick; trama continuous with the context, the lining of the tubes, however, distinctly paler.
Tissue blackening and with a slight yellowish brown stain in KOH; hyphal system dimitic, the context almost wholly of skeletal hyphae which are difficult to tease apart, rarely to frequently branched, thin- to more often thick-walled, simple-septate, 3-15 µm in diameter, also with a small amount of generative hyphae which are similar except 3-5 µm in diameter; trama continuous with the context and the hyphae similar except with more abundant generative hyphae and skeletals mostly 3-6 µm in diameter; hymenium 20-25 µm thick, with a clearly differentiated, pale yellowish brown subhymenial layer 10-30 µm thick; cystidia or setae none; basidia cylindrical-clavate, 19-25 x 6-7 µm, spores hyaline, smooth, IKI -, oblong and apiculate to subfusiform, 6.5-7.5 x 2.5-4 µm.
On angiosperms in Cuba, Jamaica, Brazil, and Sierra Leone, associated with a brown rot (see Brit. Mycol. Soc. Trans. 43:571-577. 1960). The fruiting body somewhat resembles that of Poria nigra which differs in having smaller pores, 4-8 per mm, and smaller spores, 3-5 x 2-3 µm. Fomes lividus also resembles this but differs in being generally paler, with smaller pores 4-5 per mm, and ellipsoid to oblong-oval, more or less truncate spores 3.5-5 µm wide.
A collection made by J. R. Weir in Brazil was widely distributed as P. carbonaria Bres. No such species seems to have been described by Bresadola and this appears to have been a mistake in spelling and in the authority.
P. carbonaceus is the designated type for the genus Melanoporella Murr.
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