Strobilurus albipilatus, S. occidentalis, andS. trullisatusare described and illustrated from Canadian material.Strobilurus lignitilis, Marasmius uliginosus, andPrunulus myceliosusare considered to be synonyms ofS. albipilatus. Strobilurus kemptonaeis considered to be a synonym ofS. trullisatus. Geographic and host ranges are expanded for all three species. Notes on extralimital species and a key to all recognizedStrobilurusspecies are presented.