Additions and corrections of types in the genus Buellia s. lat. (Physciaceae) described by J. Steiner

In this study, types of species in the genus Buellia described by J. Steiner are reviewed. Previously ignored holotypes of B. alboatra var. epipolioides, B. caesioatra, B. leptina, B. procellarum var. continuior, B. skutariensis f. compacta and B. skottsbergii are identified, lectotypes and isolectotypes of B. gotlandica, B. saxorum var. flavescens, B. skutariensis, B. skutariensis f. geographica and B. subtumida are designated, and the presumed holotypes of B. incrustans, B. sardiniensis, B. tergestina, B. trifracta and Diplotomma epipolium var. reagens are corrected to lectotypes. Further, the typification of B. stillingiana is reassessed. Amandinea skottsbergii (J. Steiner & Zahlbr.) Senkard. and B. flavescens (J. Steiner) Senkard. are proposed as new combinations. It is argued that the varieties Buellia alboatra var. epipolioides, B. procellarum var. contiuior, B. subdisciformis f. conzpacta (=B. skutariensis f. compacta) and B. subdisciformis f. geographica (=B. skutariensis f. geographica) should no longer be recognized but regarded as synonyms of these species. Buellia leptina is regarded as a synonym of Diploicia subcanescens and B. subtumida is reduced to being a synonym of B. dispersa. Finally, new locations are provided for B. flavescens from Italy and B. sardiniensis from France.