Updated description of (Mycenaceae, Agaricales), including three new species with brightly coloured pilei from Yunnan Province, southwest China.

An updated description of the genus , combining macro- and micromorphological characters that elaborate on the original generic characterisation, is presented. is characterised by a brightly coloured pileus, all tissues inamyloid and pileipellis covered with simple to branched excrescences. Previously, nine species were known globally, of which three species were accepted in China. Three newly-recognised species classified in the genus are here formally described from Yunnan Province: , and The new species are characterised by a yellow, orange, pink or red pileus, fusiform cheilocystidia and pleurocystidia, non-smooth pileipellis, stipitipellis smooth or with cylindrical ornamentation, caulocystidia fusiform or subglobose, if present and all tissues inamyloid. Morphological descriptions, photographs, line drawings and comparisons with closely-related taxa are presented for the new species. A phylogenetic analysis of sequence data for the rDNA internal transcribed spacer region and nuclear large ribosomal subunit (ITS + nLSU) supported that is resolved as monophyletic and also supported the taxonomic recognition of the new species. A key to the 12 species of is also provided.