tailieunhanh - 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. | Turkish Journal of Botany Research Article Turk J Bot (2016) 40: 194-200 © TÜBİTAK doi: A new species of Onosma L. (Boraginaceae) from Anatolia Rıza BİNZET* Department of Biology, Faculty of Arts and Sciences, Mersin University, Mersin, Turkey Received: Accepted/Published Online: Final Version: Abstract: 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. The new species distinctly differs from the similar two species by its patent setose and short hair of stem indumentum; 60–85 × 20–40 mm, oblanceolateobovate basal leaves; hairy corolla; and having × 4 mm, obtuse-acuminate nutlets with ventral keel and horizontally incurved beak. The IUCN threat category of O. malatyana is determined as “CR (Critically Endangered)”. Finally, the geographical distribution of O. malatyana and the other closely similar species are mapped and the identification key of those species is provided. Key words: Boraginaceae, Onosma, Endemic, Malatya, Tunceli, Turkey 1. Introduction The genus Onosma L. is the largest group in the family Boraginaceae and includes about 150 species distributed in Asia and Europe (El-Shazly et al., 2003). It is represented by 108 taxa (102 species) in Turkey and the rate of endemism among native species is 50% (Riedl, 1978; Davis et al., 1988; Yıldırımlı, 2000; Riedl et al., 2005; Binzet and Orcan, 2007; Kandemir and Türkmen, 2010; Aytaç and Türkmen, 2011; Koyuncu et al., 2013). After the revision of Onosma by Riedl (1978) for the Flora of Turkey and East Aegean Islands, O. propontica Azn.; O. kaheirei Teppner; O. mirabilis .; O.