Observations on Pluteaceae in Vietnam: Four New Species and New Records of Pluteus .

Eighteen specimens of Pluteus collected from the tropical forests of Vietnam were studied using morphological and molecular approaches. Pluteus podospilloides , P. semibulbosus , P. chrysaegis and P. septocystidiatus are registered as additional or new records for Vietnam. Four species ( P. conformis , P. lucidus , P. subroseus , and P. ornatus ) are proposed as new to science, and several other collections ( Pluteus sp. 1, P. aff. septocystidiatus , P. aff. pauperculus and P. cf. velutinus ) are given an inconclusive taxonomic status for now. The taxonomic positions of all specimens were confirmed using DNA data (nrITS and tef1 ). Descriptions of the macro- and microscopic features of the studied collections with a discussion of similar taxa are given.