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Page number:256 
Remarks (public):Fomitopsis includes species with a perennial or rarely annual basidiocarp and a dull to laccate, glabrous pileus. The rot is brown, and this and the perennial basidiocarp are the main characters that separate it from Trametes, which has the same type of spores and hyphal system. Carranza-Morse & Gilbertson (1986) have a survey of all Fomitopsis species with beige to pink context. For this group Kotlaba & Pouzar (1990) have described the genus Rhodofomes, see comments under F. roseus. Corner (1989) merges Fomitopsis with Trametes, placing more emphasis on the trimitic hyphal system than the type of rot.
Description type:Non-original description 
Description:FOMITOPSIS Karst. - Medd. Soc. FL Fauna Fenn. 6:9. 1881.
Basidiocarps perennial or rarely annual, sessile to effused-reflexed, tough to woody; pore surface and context white to tan or pinkish, pores mostly small, regular; hyphal system dimitic or trimitic; generative hyphae with clamps; cystidia present or absent; basidia clavate, 4-sterigmate, with a basal clamp; basidiospores subglobose to cylindric, hyaline, smooth. negative in Melzer's reagent. Causing a brown cubical rot of living or dead conifers and hardwoods. Cosmopolitan genus. but most species are found in the boreal and temperate zones.
Type species: Polyporus pinicola Swartz: Fr.
Synonyms: Laricifomes Kotl. & Pouz. 1957 (Polyporus officinalis Vill.:Fr.) Rhodofomes Kotl. & Pouz. 1990 (Polyporus roseus Alb. & Schw.:Fr.).
For further synonyms based on non-European species, see Ryvarden (1991:149).
Taxon name: