Abstract
Two new species of Clavulina (Clavulinaceae, Cantharellales, Basidiomycota) from southwestern China are substantiated based on morphological evidence and molecular phylogenetic analyses. Both are consistent with the generic properties of Clavulina that include coralloid, branched basidiomata, amphigenous hymenia, basidia with two cornuted sterigmata, and postpartal septa. The first new species, Clavulina flava, is unique for Clavulina in having bright yellow basidiomata, and the second, Clavulina purpurascens, has pale purple basidiomata. The two new species are described in detail, illustrated with line drawings and photographs, and compared with similar species. Intrageneric relationships were examined with phylogenetic analyses based on the sequences of the second largest subunit of DNA-dependent RNA polymerase II (RPB2) and the large subunit of nuclear ribosomal RNA gene (LSU). A key is provided for the known Clavulina species in China.
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