ANATOMICAL AND MORPHOLOGICAL STRUCTURE OF THE VEGETATIVE ORGANS OF <i>CIRCAEA LUTETIANA
Circaea lutetiana belongs to the family Onagraceae Juss. and grows in a belt of beech and beech-hornbeam forests of the Crimea. This is a rare and unique plant, which is listed in the Red Book of 23 regions, territories and republics. Circaea lutetiana is a little-known plant, a detailed description of the internal structure of organs and their morphological features is not found. In the literature there are data on the chemical composition of plants and fragmentary information on the morphology of some vegetative and generative organs. For this species in the Crimea there is only a biomorphological characteristic and the study of the current state of populations. A comprehensive study of the morphological structure of the object is not performed. Anatomical and morphological studies will complement the characteristics of the species, to understand the degree of its adaptation to growing conditions, to assess the plasticity and potential functionality. Therefore, the aim of our work is to study the anatomical and morphological structure of the vegetative organs of Circaea lutetiana L. The research was carried out in 2017-2018 on the material withdrawn from the natural population in the beech forest of the Northern macro-slope of the Crimean mountains, in the area of Angarsk pass (about 800 m above sea level). M.). The anatomical and morphological structure of the root, rhizome, stem, petiole and leaves of Circaea lutetiana was studied. Revealed the presence of mesomorphic characteristics (a thin plate that has a small number of mechanical elements; bifacia in the structure of the mesophyll; the developed system of intercellular spaces in the leaf; a funnel-shaped form of the Palisades; the stomata on the lower side; surface with small bundles poorly developed, represented by cells, which do not differ from basic to assimilation; the lack of clarificatio and parenchymatic tissues of the axial organs). Set the character of the pubescence and the topography of the trichomes on the organs of plants. Pubescence is represented by simple unbranched trichomes of several types: straight; arcuate-curved hook-bent; flat ribbon-shaped (with rare spirals) and trichomes with a rounded bubble head. The nature of the distribution of trichomes is uneven: areas without trichomes are replaced by clusters. At the top of the stem on the border with the main axis of the inflorescence, pubescence becomes almost felt. Identified clusters of crystalline inclusions in the form of rafid in all vegetative organs of the studied specie.