Scientific Journal of KubSAU

As the result of introduction research of Dagestan endemic Allium gunibicum under mountain conditions seed productivity variability data were obtained. An analysis of the data revealed significant difference in seed productivity performance of samples (inflorescence mass, seed mass, mass of 100 seeds, fruit number, ovules number, number of seeds, percentage of fruit bloom, seeds formation coefficient) among themselves both within one-year research and annually. The analysis showed that under the introduction with the same conditions the mean values of seed productivity characteristics decrease together with increasing of the sea level of collecting locations; at the same time, a mass of 100 seeds increases. The most variable factors were found out. They are seed mass in inflorescence, seed number in inflorescence, seeds formation coefficient. And the steadiest factors are a percentage of fruit bloom and mass of 100 seeds. As the result of the one-way analysis of variance a significant influence of the altitude above the sea level and slope disposition were discovered

The distribution and variability of features of the endemic of flora Eastern Caucasus Centaurea daghestanica (Lipsky) Czer. were given in this article. Eleven locations of the species are detected and three of them are new ones. C. daghestanica grows in the lower and middle mountain belts from 400 to 1250 m above sea level. In the lower belt, the species is found on clayey areas of the solonchak valley of Kar-Kar and the limestone slopes adjoining the valley, on average on shale screes and stony slopes. Three populations of the C. daghestanica we studied. Species composition on the investigated sites was determined, and a geobotanical description is carried out. Project coverage of C. daghestanica in the studied populations varies within 2–5%. By generative individuals of different ages were represented mainly populations. One generative shoot from 30 individuals in each population was taken to reveal the variability of the generative shoot structure, on which 13 traits were taken into account. The degree of variability of the morphological features of C. daghestanica shoot is different, the influence of the altitude level on them is not the same. The annual shoot of C. daghestanica has an average of 3-5 branches of the first order. Branches of all levels are located at the bottom of the shoot

In the given work there is information about peculiarities of distribution and phytocenotic placement of the endemic of Dagestan flora Helianthemum daghestanicum Rupr. Twenty five locations of the species are detected and four of them are new ones. Altitude levels of its spreading are defined more accurately – 350 – 1750 m. It is notified that basic types of vegetation, where Sunrose Dagestanian can be met, are communities of mountainous xerophytes and mountain steppes with domination of Botriochloa ischaemum and Salvia canescens