Pharmacognostic study of Catharanthus roseus (L.) G. Don, growing in Uzbekistan

In the article, the morpho-anatomical structure of the leaf and stem of Catharanthus roseus species distributed in the local conditions of Uzbekistan was studied, and it was determined that biologically active substances are found in the leaf mesophyll and bark parenchyma of the stem. The following diagnostic characters were determined: in the leaf – dorsiventral type of leaf mesophyll; thick-walled outer walls of the epidermis; amphistomatic leaves; not submerged stomata; chlorophyll-bearing palisade and spongy parenchyma; closed collateral type of conduction bundles; the presence of numerous idioblasts; in the stem there is a more lignified, non-tufted type of structure; libriform extensive; radial rays elongated and short; phloem is extensive, located between the crustal parenchyma and the libriform; the core is not wide, represented by large and small round-oval, thin-walled parenchyma cells containing hydrocyte cells and numerous laticifers. The content of moisture, ash, extractives extracted by heteropolar extractants was also studied, determined by pharmacopoeial methods to establish authenticity and prepare draft regulatory documentation for plant raw materials.