The results of a comparative study of the structure of some vegetative organs of A. caspium and A. tschimganicum growing in natural conditions in Uzbekistan are presented for the first time. During the study of the desert representative A. caspium, the following diagnostic, structural features were re

For the first time, the anatomical structure of the vegetative organs of the species J. hippolyti and J. narbuti was studied in the conditions of Kyzylkum (Uzbekistan, Province Bukhara) and revealed the diagnostic features of these species. A different combination of xeromorphic and mesomorphic features was determined, which ensures adaptation to habitat conditions. In J. narbuti xeromorphic features predominate, which indicates a more adaptable and wide distribution in the natural habitat of this species. In J. hippolyti-mesomorphic signs that show the rarity of the species in their natural habitat, compared to J. narbuti.

The morpho-anatomical structure of the aboveground and underground organs of the rare endemic species Iris (Juno) magnifica, growing under natural conditions of the Zeravshan ridge, Samarkand mountains, has been studied for the first time. A comparative analysis of the morpho-anatomical structure of the aboveground and underground organs revealed characteristic diagnostic signs of a microscopic structure. The complex of anatomical features of the aboveground and underground organs of the studied species are species-specific and can be used to solve taxonomic problems of this genus of plants, as well as the Red Book endemic species of juno irises, are of particular interest in connection with the potential for their vegetative reproduction.

The article provides a review of studies of the vegetation cover of the Western Tien Shan of the NorthEastern slope of the Kurama ridge of the Parkent district (the left bank of Parkentsai) with the participation of the rare endemic species Juno orchioides. The article presents the main results of work in the field of geobotany and botanical geography carried out in the Tashkent region. A list of plants of 4 communities of the herb-shrub association with the participation of the species Juno orchioides is given. The association contains more than 90 species of plants. Of these, trees – 10, shrubs – 9, perennials – 71, annuals – 8. Anthropogenic factors and grazing are the reason for the decrease in this species of Juno orchioides, and in the future, measures for reintroduction must be applied to preserve and restore this species.

Central Asia is one of the main centers of origin of bulbous geophytes, including the family Amaryllidaceae Juss. The anatomical features of many endemic, red-book bulbous geophytes are still poorly understood. The article presents the results of a structural study of the inflated part of the stem (fistular), stem and pedicels of an endemic A. praemixtum species grow in two different environmental conditions in the Aktau mountain Nurata Range (Uzbekistan, Province Navoi) and in the conditions of introduction in the Tashkent Botanical Garden (Uzbekistan, Tashkent city). Diagnostic signs of vegetative organs were revealed and various combinations of xeromorphic and mesomorphic signs were determined. Comparative anatomical study of vegetative organs of A. praemixtum is of great theoretical and practical importance in relation to taxonomy and ecology.