Species of Agaricus section Agaricus from China

Agaricus section Agaricus is generally recognized as a monophyletic group. In this study, 28 specimens of this section were collected from five provinces of China. Phylogenetic trees were produced based on the ITS sequences using Maximum Likelihood and Bayesian analyses. Based on this phylogenetic approach combined with their morphological examination, five species are identified including two new species named as A. jilinensis and A. zhangyensis, and three new recorded species from China, A. aristocratus, A. griseicephalus and A. argenteus. All species were described and illustrated in detail.