Morphological Characteristics and Phylogeny Reveal Six New Species in Russula Subgenus Russula ( Russulaceae, Russulales ) from Yanshan Mountains, North China.

Species of the genus Russula are key components of ectomycorrhizal ecosystems worldwide, some of which are famous edible fungi. Although many new species have been described in China, their diversity in North China is still poorly known. Based on the morphology observation of specimens and molecular phylogenetic analyses, combined with the current classification frame of Russula , six new species of Russula subgenus Russula are proposed from the Yanshan Mountains in northern Beijing and northern Hebei Province of China in this study: viz. Russula miyunensis (subsection Chamaeleontinae ), R . plana (subsection Chamaeleontinae ), R. sinoparva (subsection Puellarinae ), R. sinorobusta (subsection Puellarinae ), R. subversatilis (subsection Roseinae ), and R. yanshanensis (subsection Puellarinae ). This is the first report of the species of Russula subgenus Russula from the Yanshan Mountains. This study enriches the species diversity of Russula in North China and provides new data support for the systematic study of Russula in subsequent research, including research and development on edibility.