Four new species of <i>Hydnellum</i> (<i>Thelephorales</i>, <i>Basidiomycota</i>) with a note on <i>Sarcodon</i> <i>illudens</i>

Four new Hydnellum species are described. roseoviolaceum sp. nov . grows in dry pine heaths on acidic, sandy soil. It is close to H. fuligineoviolaceum , another pine-associated species, but differs by smaller spores, an initially rose-coloured instead of violet flesh fresh basidiomata and a mild taste. scabrosellum coniferous forests calcareous shares general morphology with scabrosum which also its closest relative. having slenderer the yellowish ochraceous colour spines dried specimens compared whitish or reddish brown seen fagiscabrosum morphological phylogenetic affinities However, it associated trees from Fagales whereas Pinaceae nemorosum yet that associates broadleaved trees. seems be rare morphologically reminiscent ioeides scabrosum, phylogenetically fennicum Sequences type glaucopus lepidum Sarcodon illudens S. regalis included analyses. Specimens given provisional name " pseudoglaucopus Sweden now shown referable S The analyses further showed H combination proposed. conspecific and, although their basionyms were simultaneously published, was only validated later publication. therefore takes priority becomes synonym.