The article presents the results of botanical and geographical analysis of the cultivated flora of the Karshi oasis. It was revealed that the assortment of flower and ornamental plants of the cultivated flora of the Karshi oasis consists of 41 species. The largest number of species comes from the Caribbean (24.3 %), Mediterranean (19.5 %), Brazilian (14.6 %) and Atlantic-North American (14.6 %) floristic regions. It has been established that xerophilic representatives of the arid regions of North America and the Mediterranean region are promising for the Karshi oasis. For a successful culture of representatives of Caribbean and Brazilian origin, it is recommended to use a seedling method of growing and plant them in open ground as early as possible.
To assess the state of coenopopulations of rare and endemic plants, it is important to evaluate the age index, efficiency index, and delta-omega analysis. For this, we studied the age composition of six coenopopulations of Lipskya insignis (Apiaceae) located in the south of the Republic of Uzbekistan. The results showed that in all studied coenopopulations generative individuals prevail, the number of which in most cases is more than half of the total. The calculation of the age index showed that the state of all coenopopulations is mature. Delta-omega analysis also confirmed the result, and deviations were observed only in hundredths of an age index.
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