Onosma satensis sp. nov. (Boraginaceae: Lithospermeae), a new species from Hakkari (eastern Anatolia, Turkey)

A new species of Onosma L. (Boraginaceae: Lithospermeae), from the Hakkari province eastern Turkey, is described and illustrated. The endemic distributed in a narrow area Sat Mountains. Taxonomically closest relative satensis sp. nov. O. polioxantha Rech. f. which also occurs Turkey. In addition, it primarily distinguished by its navicular leaves, longer reticulate cauline pedicels calyx, densely patent short setulose outside, corolla bigger nutlets. geographical distributions map, detailed photographs, habitat description, vernacular name, an IUCN conservation status identification key for were provided. Nutlets pollen micrographs are presented using scanning electron microscopy.