The rare fungus Hygrophoropsis rufa is documented from the Czech Republic for the first time. Both classical and DNA study results have proved that H. rufa is a good species, clearly separated from H. aurantiaca. Macroscopically, it differs by an orange-brown to dark brown pileus surface. The stability of the observed differences in spores, being slightly smaller and thick-walled in H. rufa, has to be confirmed using a larger set of collections. A brief comparison with dark-coloured taxa of the group of H. aurantiaca is added. Hygrophoropsis aurantiaca var. atrotomentosa most probably represents a synonym, but its nomenclatural status has to be clarified.
Holec J., Kolařík M. (2013): Notes on the identity of Hygrophoropsis rufa (Basidiomycota, Boletales). – Czech Mycology 65(1): 15–24.
