Evaluation of Anatomical Features of Adenia Wightiana (Wall. Ex Wight & Arn.) Engl. of Passifloraceae for Proper Identification of the Species
Adenia wightiana, a tendril climber of the family Passifloraceae, is used as an important medicinal plant and also as a leafy vegetable. Since the genus Adenia comprises of a large number of species the proper identification of the particular species is very important. Cross section of leaf, petiole, stem, root, root tuber and powder microscopic studies were done to bring out the anatomical significance of the species Adenia wightiana. Paracytic stomata of unequal subsidiary cells; dendroid vein terminations; irregularly lobed scelereids and tannin cells in the upper epidermis of lamina; druse idioblasts in the mesophyll of leaf and cortex of root and root tuber; cuticular projections with annular striations in the epidermal cells of leaf; accessory vascular bundles in the petiole; cleaved vascular cylinder, wide vascular rays, abundant axial parenchyma, diffuse porous wood of stem; discrete clusters of vascular tissue and highly proliferated ground parenchyma in the root tuber; vessel elements with simple perforations and alternate lateral wall pitting; fibre-tracheids cylindrical, four lobed starch grains with polarimarks in the root tubers are some of the distinctive characters for identification of the taxon studied.