Laccaria guizhouensissp. nov. (Agaricales, Basidiomycota) from Southwest China

ABSTRACTThe genus Laccaria(Hydnangiaceae, Agaricales) is an important ectomycorrhizal symbiont of a broad range of host plants. Laccaria guizhouensiswas collected from a subtropical mixed forest dominated by Fagaceae in Southwest China and described based on morphological characteristics and molecular data. Laccaria guizhouensisis characterised by its medium-sized basidiocarps and strong striate or sulcatus, flesh-coloured to brown pileus, flesh-coloured to brown lamellae, 2- to 4-spored basidia, globose to obellipsoid, hyaline, moderately echinulate basidiospores, and 1–1.5 μm-long echinulate. Phylogenetic analyses based on ITS sequences (HMAS352265 and HMAS352266) indicated that L. guizhouensisrepresented a new species separated from all other Laccariaspecies.