Two new species of Pholiota (Agaricales, Strophariaceae) from the southwest of China

Abstract

Two new mushroom species from Southwest China, Pholiota cylindrospora and P. subterrestris, are described in this study. Pholiota cylindrospora is characterized by its dry pileus with slightly recurved and triangular scales, cylindrical basidiospores, and two types of pleurocystidia—leptocystidia and chrysocystidia—as well as its growth on soil. Pholiota subterrestris is identified by a brownish-orange pileus with numerous brown fibrillose scales; pale brown lamellae with even edges; a stipe covered with recurved fibrillose scales; elliptical spores with a distinct but small germ pore; and pleurocystidia containing typical amorphous refractive inclusions of chrysocystidia. Both species are described and illustrated, and a phylogenetic analysis of a multigene dataset (ITS + 28S) is presented. Morphological and phylogenetic analyses confirm that P. cylindrospora and P. subterrestris are distinct from the other Pholiota species, and both belong to the subgenus Pholiota. A key to the species of subgenus Pholiota from China is provided.