A new species of Onosma L. (Boraginaceae) from Anatolia

Onosma malatyana Binzet is described and illustrated as a new species from Malatya and Tunceli provinces in eastern Anatolia, Turkey. The new species belongs to sect. Onosma L. subsect. Asterotricha (Boiss.) Gürke. and is closely similar to O. auriculata DC. and O. gigantea Lam. Diagnostic morphological and palynological characters of these species are compared and discussed.