Abstract: Descriptions are given of the two species of Pycnoporellus occurring in Fennoscandia, P. alboluteus (Ell. & Ev.) Kotl. & Pouz. and P. fulgens (Fr.) Donk. Their distributions in North Europe are mapped, and their world distributions reviewed. Their ecology, phenology, host relationships, and cultural and microscopical characters are discussed. Great variability exists in the microscopical characters of both species. P. alboluteus is very rare in North Europe, where it has been recorded from only two localities in northern Finland, on Picea abies and once on Alnus incana. P. fulgens is rare and south-eastern in distribution, being known from four Swedish localities and several localities in southern Finland and the adjacent U.S.S.R., mostly on Picea abies, but also on Pinus sylvestris, Populus tremula and Betula. Study of the types indicates that the names Irpex woronowii Bres. and Lenzites sepiaria var. dentifera Peck are synonymous with P. alboluteus, and that Ochroporus lithuanicus Byonski (type selected), Polyporus aurantiacus Peck and P. fibrillosus Karst. are synonymous with P. fulgens. The taxonomic position of the genus Pycnoporellus is discussed.