Four new species of (Omphalotaceae, Agaricales) from subtropical regions of China.

Four new species of , namely , , , and , were discovered in the subtropical regions of China. These species were identified based on morphological characteristics and molecular analysis. Morphologically, is characterized by its pileal surface, white in color with a light brown center; slender, cylindrical cheilocystidia; and absence of pleurocystidia. is recognized by the reddish-brown, hygrophanous pileus; adnate to adnexed lamellae; and relatively broad basidiospores. is identified by free lamellae, fusiform to utriform pleurocystidia, and relatively broad basidiospores. is distinct by relatively broad basidiospores and a minute, snow-white ring or ruff at the stipe base. In the phylogenetic analysis based on combined ITS and LSU sequences, the four new species formed distinct and stable branches (BI-PP = 1; ML-BP = 100%), respectively. formed a sister lineage with . The new species , , and were found to be nested within the species complex clade. Detailed descriptions, color photos, and a key to related species are presented.