Basionym: Polyporus tephroleucus Fr., Systema Mycologicum 1: 360 (1821) [MB#201871] Obligate synonyms: - Tyromyces tephroleucus (Fr.) Donk, Mededelingen van het botanisch Museum en Herbarium van de Rijksuniversiteit Utrecht 9: 150 (1933) [MB#280015] - Oligoporus tephroleucus (Fr.) Gilb. & Ryvarden, Mycotaxon 22 (2): 365 (1985) [MB#105589] - Spongiporus tephroleucus (Fr.) A. David, Bulletin Mensuel de la Société Linnéenne de Lyon 49 (1): 37 (1980) [MB#114047] - Polystictus tephroleucus (Fr.) Bigeard & H. Guill., La Flore des Champignons supérieurs de France ed. 2: 374 (1913) [MB#473769] - Boletus tephroleucus (Fr.) Spreng., Caroli Linnaei systema vegetabilium 4 (1) (1827) [MB#449607] - Bjerkandera tephroleuca (Fr.) P. Karst., Bidr. Känn. Finl. Nat. Folk: 297 (1882) [MB#244957] - Leptoporus tephroleucus (Fr.) Quél., Enchiridion Fungorum in Europa media et praesertim in Gallia Vigentium: 176 (1886) [MB#491945] Taxonomic synonyms: - Polyporus linearisporus Velen., Ceske Houby 4-5: 654 (1922) [MB#269538] - Polyporus elatinus Berk., Hooker's Journal of Botany and Kew Garden Miscellany 6: 140 (1854) [MB#225947] - Piptoporus elatinus (Berk.) Teng, Zhong Guo De Zhen Jun [Fungi of China]: 762 (1963) [MB#337051] - Tyromyces elatinus (Berk.) S. Ahmad, Basidiomycetes of West Pakistan: 97 (1972) [MB#325204] - Bjerkandera melina P. Karst., Meddelanden af Societas pro Fauna et Flora Fennica 14: 80 (1887) [MB#140791] - Tyromyces melinus (P. Karst.) Bondartsev & Singer, Annales Mycologici 39 (1): 52 (1941) [MB#307285] - Polyporus melinus (P. Karst.) Sacc., Sylloge Fungorum 6: 134 (1888) [MB#228819] - Polyporus tokyoensis Lloyd, Synopsis of the section Apus of the genus Polyporus (7): 302 (1915) [MB#200645] - Bjerkandera cinerata P. Karst., Meddelanden af Societas pro Fauna et Flora Fennica 16: 103 (1890) [MB#236358] - Polyporus cineratus (P. Karst.) Sacc., Sylloge Fungorum 9: 169 (1891) [MB#179542] - Polyporus tokyvensis Lloyd (1915) [MB#277731]