Contribution to the study of genus Boletus, section Appendiculati: Boletus roseogriseus sp. nov. and neotypification of Boletus fuscoroseus Smotl.

The paper deals with Boletus roseogriseus and Boletus fuscoroseus , two closely related species of the genus Boletus , section Appendiculati . B. roseogriseus is described as a new species based on a morphological and molecular study of collected material. B . fuscoroseus , validly published by Smotlacha in 1912, has been often incorrectly named Boletus pseudoregius . This name, however, does not have priority because B. pseudoregius was validly published as late as 1988. In order to contribute to clarification of some controversial questions concerning B. fuscoroseus , the authors have selected a neotype for this species. Descriptions of B. roseogriseus and B. fuscoroseus are accompanied by results of a molecular study (ITS and LSU rDNA sequences) and a discussion of characters distinguishing these species from other representatives of section Appendiculati .