Update on the taxonomy of Clavulina in China II: description of four new species from Hainan Island

Four new species of Clavulina are described from specimens collected in the tropical rainforests of Hainan Island, China. Molecular phylogenetic analyses based on concatenated ITS + LSU + RPB2 sequences and morphological characters support the placement of these accessions within the genus Clavulina and their recognition as new species. Accordingly, Clavulina hainanensis, C. pallidorosea, C. tomentosa, and C. eburnea are described and illustrated. We provide photographs, line drawings, and DNA sequences of the new species, and a key to all known Clavulina species in China. Holotypes of the new species are deposited in the Mycological Herbarium of Hunan Normal University (MHHNU).