New species and a synonym of the genus Hesperis (Brassicaceae) from Turkey

Hesperis tosyaensis A.Duran, a new species from northern Anatolia, is described and illustrated. It grows under open Quercus forest. The new species is distinct from the closely allied H. ozcelikii A.Duran by the following features: stem erect, 45–90 cm tall, hispid, hairs 2–2.5 mm, and fruit glabrous.