Two new taxa of Russula from the Dinghu Mountain, Guangdong Province, China were described and illustrated based on both morphological data and phylogenetic analysis of the internal transcribed spacer sequences. Russula dinghuensis is characterized by the olive green pileus, acute and incurved margin, white and rarely forked lamellae, white spore print, globose to ellipsoid basidiospores with stocky and isolated warts, thick metachromatic pileipellis, and slender, furcated and septated terminal elements of pileipellis. Russula subpallidirosea is recognized by the pale pink to pale grayish-pink pileus, white and forked lamellae, white spore print, subglobose to ellipsoid basidiospores with the isolated, subcylindrical to conical warts, the metachromatic pileipellis, and the short, furcated and septate terminal elements of pileipellis. Both molecular and morphological analyses consistently confirm that these two new taxa are placed into Russula subg. Heterophyllidia subsection Cyanoxanthinae. The morphological differences among these two novel species and the closely related taxa are discussed.
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Vol. 38 • No. 2