Two new species of genus Leucoagaricus and Leucocoprinus (Agaricaceae, Agaricales) from China

In this study, two new species, <i>Leucoagaricus bailangshanensis</i> and <i>Leucocoprinus ferrugineus</i>, were discovered. Phylogenetic analyses based on ITS, nrLSU, <i>rpb</i>2, and <i>tef</i>1-<i>α</i>sequences confirm that these taxa represent distinct lineages within well-supported monophyletic groups. <i>Leucoagaricus bailangshanensis</i> is characterized by a yellow-orange center on the pileus, a margin bearing floccules, and relatively long sterigmata, which distinguish it from closely related species. <i>Leucocoprinus ferrugineus</i> can be recognized by its mahogany-red pileus center, a white annulus with a tomato-red margin that turns brown when bruised, and ellipsoid basidiospores. Detailed morphological descriptions, along with color photographs, illustrations, and a phylogenetic tree, are provided to clarify the taxonomic positions and relationships of these two new species.