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Page number:251 
Remarks (public):This tropical species is included here because it has been recorded in a number of European countries although rarely. Humboldt described the species in 1793 from a mine in Freiberg in Germany. and it is mystery how this tropical species arrived there at that time.
The genus is closely related to Junghuhnia, separated only by the vivid yellow pore surface. Since colour has been accepted as a taxonomic character in this flora (Pycnoporus versus Trametes for example). the genus is accepted here.
Ginns (1980) who has written a monograph of the genus. includes also species without the strong yellow colour. making the distinction towards Junghuhnia rather vague.
 
Description type:Non-original description 
Description:FLAVIPORUS Murr. - Bull. Torrey Bot. Club 32:360. 1905.
Basidiocarps effused reflexed to resupinate, annual; pileus when present dark brown to bay. glabrous; pore surface vivid chrome yellow, pores tiny, almost invisible to the naked eye; tubes concolorous; context thin and yellow.
Hyphal system dimitic; generative hyphae with clamps; skeletal hyphae abundant; basidia tetra-sterigmate; metuloid cystidia present; spores ellipsoid, smooth, negative in Melzer's reagent. shorter than 5 µm; causes a white rot.
Tropical genus. in Europe only one species which has been collected exclusively on structural timbers in mines, greenhouses etc.
Type species: Polyporus rufoflavus Berk. & Curt. = Polyporus brownii Humb.
 
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