“…The new taxa were assessed based on the diagnostic keys of Flora Iranica (Riedl, 1967), Flora of Iran (Khatamsaz, 2002), Flora of Turkey (Riedl, 1979), Flora of USSR (Popov, 1953), Boissier (1879), Johnston (1954), Post (1966), Polunin (1969), Ball (1972) and Nasir & Ali (1979). Several newly introduced taxa of Onosma were evaluated and compared with our new taxa (see: Teppner, 1980; Ghahreman and Attar, 1996; Attar and Joharchi, 2006; Attar and Hamzehee, 2007; Binzet and Orcan, 2007; Kandemir and Türkemen, 2010; Aytac and Türkmen, 2011; Koyuncu et al, 2013; Mehrabian et al, 2013; Ahmad, 2014; Binzet, 2016 a, b; Cecchi et al, 2016; Binzet and Eren, 2018; Mehrabian and Amini Rad, 2018; Mehrabian and Mozaffarian, 2018; Dehshiri, 2018; He et al, 2018, 2020). Additionally, more than 2500 accessions of Onosma specimens, and images of type specimens in several herbaria of Iran (HSBU!, TARI!, IRAN!)…”