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


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, oblanceolate-obovate basal leaves; hairy corolla; and having 4.5 × 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.

Keywords: Boraginaceae, Onosma, Endemic, Malatya, Tunceli, Turkey

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