Two new Xeromphalina (Mycenaceae, Agaricales) species with eccentric stipes from subtropical China

Abstract

Two new Xeromphalina species with eccentric stipes are described from subtropical China. Xeromphalina brevipes sp. nov. is characterized by a pileus without a depressed centre, a rather short stipe, cylindrical basidiospores, and subcoralloid to coralloid circumcystidia and caulocystidia. Xeromphalina utricularis sp. nov. can be distinguished by its small and cylindrical basidiospores, utriform cystidia and its growth habit on rotten Pinus densata Mast. wood in the montane zone. Photographs and illustrations of the basidiomata and morphological features of these species are presented. Morphological characters, when compared with related Xeromphalina species, and phylogenetic analyses based on internal transcribed spacer sequences with Maximum Likelihood and Bayesian Inference, demonstrate that the two new taxa are different from related Xeromphalina species.