Arrhenia schistidicola (Hygrophoraceae, Agaricales) – a new species on the moss Schistidium crassipilum from western Norway

Abstract

The new species Arrhenia schistidicola Øvstedal & L.Lindblom is described from Western Norway, growing on the moss Schistidium crassipilum on vertical mortar walls. Arrhenia schistidicola is characterized by the lack of a stipe, molecular evidence, and its host moss. It is morphologically similar to A. retiruga, however, molecular analyses show that it is more closely related to A. spathulata.