Synonymy:
Agaricus ursinus Fr., Systema Mycologicum 1: 185 (1821)
Lentinus ursinus (Fr.) Fr., Epicrisis Systematis Mycologici: 395 (1838) [1836-1838]
Hemicybe ursina (Fr.) P. Karst., Bidr. Känn. Finl. Nat. Folk 32: 248 (1879)
Pocillaria ursina (Fr.) Kuntze, Revis. gen. pl. (Leipzig) 2: 866 (1891)
Resupinatus ursinus (Fr.) Murrill, N. Amer. Fl. (New York) 9(4): 246 (1915)
Panellus ursinus (Fr.) Murrill, N. Amer. Fl. (New York) 9(4): 246 (1915)
Lentinus vulpinus f. ursinus (Fr.) Pilát, Monographie des espèces européennes du genre Lentinus Fr.: 36 (1946)

Agaricus pelliculosus Schwein., Schriften Naturf. Ges. Leipzig 1: 90 [64 of repr.] (1822)
Lentinus pelliculosus (Schwein.) Fr., Elench. fung. (Greifswald) 1: 47 (1828)
Pocillaria pelliculosa (Schwein.) Kuntze, Revis. gen. pl. (Leipzig) 2: 866 (1891)

Lentinellus ursinus f. luxurians P.-A. Moreau, in Moreau, Roux & Mascarell, Bull. Trimestriel Soc. Mycol. France 115(3): 334 (1999)

Lentinellus castoreus var. hispidus P.-A. Moreau & P. Roux, in Moreau, Roux & Mascarell, Bull. Trimestriel Soc. Mycol. France 115(3): 348 (1999)

Position in classification:
Lentinellus, Auriscalpiaceae, Russulales, Incertae sedis, Agaricomycetes, Basidiomycota, Fungi

Note:
We aim to keep taxonomic opinions up to date, but errors or delays can occur. Please report them to our curator.