Anatomical investigations of Nonea dumanii (Boraginaceae)

Nonea Medik. species are represented worldwide by about 35 species and represented by 23 species in Turkey. Nonea species are commonly known as Sormuk otu and some species use as folk medicine; aerial parts prepared as porridge are used for wound healing and internally for stomachache in Turkey. In this study stem and leaf anatomy of the endemic Nonea dumanii Bilgili & Selvi species (Boraginaceae) was investigated. In the cross section of stem, cortex has 2-3 layers collenchymatic cells and multilayered parenchymatic cells. Epidermis contains glandular and eglandular trichomes on stem and leaf. Xylem is composed of sclerenchymatic cells and tracheary elements in vascular bundles. The pith is composed of parenchymatical cells. Stomata are anomocytic and amphistomatic in leaves. The sizes of stomata in abaxial surface are bigger than the sizes of stomata in adaxial surface, also stomata index of abaxial surface is bigger than in adaxial surface. Minor bundles are surrounded by one layered parenchymatic sheat in leaf. Palisade tissue is existing on both side of leaf (isobilateral). Spongy tissue