Boletus sinopulverulentus, a new species from Shaanxi Province (central China), and notes on Boletus and Xerocomus

Boletus sinopulverulentus, a new species discovered in Shaanxi Province (central China), is formally described and illustrated.A detailedmorphological description is pro- vided and accompanied by line-drawings of the main anatomical features, a colour illus- tration of fresh material in habitat and the pertinent supporting molecular data (ITS se- quences analysis). Boletus sinopulverulentus belongs to the B. pulverulentus species com- plex. The diagnostic traits of the species allied to the new taxon are also discussed for comparison. Finally, based on molecular analysis the taxonomy of Boletus and Xerocomus is brieflydiscussed