THE ANATOMICAL INVESTIGATION ON Pallenis spinosa (L.) CASS. (ASTERACEAE)

Pallenis spinosa (L.) CASS. is a monotypic species for Turkey. It’s an annual and herbaceous plants. The cross-section of the root of the species has a 1-2 row of epidermis cells. Cortex cells fills between the epidermis and the central cylinder. Root has a radial vasculer bundle. The cross-section of the stem has a round shape. There is a single row and regular lined of cortex cell over the vasculer bundle as a starch sheath. The sclerenchyma cells is cover the top of floem cells in the colleteral vascular bundle. The leaves is a bifacial type. There is a stoma both side of the leaves. Karyological work done by species. Chromosome number of 2n = 10, respectively.