Arrhenia sphagnicola (Berk.) Redhead, Lutzoni, Moncalvo & Vilgalys  

Family: Tricholomataceae

[Agaricus gerardianus Peck,  more, Agaricus sphagnicola Berk., Arrhenia fusconigra (P.D. Orton) P.A. Moreau & Courtec., Arrhenia gerardiana (Peck) Elborne, Clitocybe fusconigra (P.D. Orton) H.E. Bigelow, Clitocybe gerardiana (Peck) Sacc., Clitocybe sphagnicola (Berk.) Raithelh., Omphalia gerardiana (Peck) Peck, Omphalia sphagnicola (Berk.) P. Karst., Omphalina fusconigra P.D. Orton, Omphalina gerardiana (Peck) Singer, Omphalina oniscus var. fusconigra (P.D. Orton) Krieglst., Omphalina sphagnicola (Berk.) M.M. Moser]