Morphological, anatomical, and ecological investigations on some species of Onosma L. (Boraginaceae)

In this research, O. argentata, O. beyazoglui and O.discedensspecies, belongs to Onosma L. (Boraginaceae) and endemic species in our country, morphologically, anatomically and ecologically studied. During the study of morphological features; morphologic characters of stem, and leaf flowers have been represented. In the anatomic study, the stem anatomiesof species are studied with the help of species taken from each three stems. In the ecological study, the habitat features, the common taxa live together and the soil characteristics they prefer have been determined. When species were compared in terms of morphological properties, O. beyazoglui species differs drastically from other two species especially in root sizes, colour of flower, the number of stem and the colour of stem. When the species anatomic features are compared important differences especially in the stem have been determined. The most striking ones are the rate of pith area to the all stem and the types of pith parenchyma cells. It has also been determined that there are differences in the number of cells that forms the stemcortex among the species. When they were compared in terms of ecological aspects, every 3 species analyzed has the similar physical and chemical structure. O. beyazoglui type shows distribution in gypsum-bearing areas different from other two species. 2019, 71Pages Key word: Boraginaceae, Onosma, Morphology, Anatomy, Echology, Endemic,Erzincan