A new species Oligoporus septentrionalis Vampola is described for a very rare, yellow coloured, resupinate polypore called Poria johnstonii Murrill = Tyromyces johnstonii (Murrill) Ryv. in northern Europe. According to results of revision of the type specimen (K!), Poria johnstonii described from California, USA, represents a cream coloured form of Cinereomyces lindbladii (Berk.) Jülich = Poria cinerascens (Bres. in Strasser) Sacc. et Syd. The first Czechoslovak collection of Oligoporus septentrionalis is published in this paper.
Vampola P. (1992): Oligoporus septentrionalis, a new polypore for Czechoslovak mycoflora. – Česká Mykologie 45(4): 144–149.
