| Summary: | The state of coenopopulations of vegetatively-semimobile dwarf shrubs Thymus iljinii, T. minussinensis, T. mongoliens, T. petraeus, widely distributed in steppe communities in Southern Siberia was studied. Adults of the species are a clump consisting of a primary and several partial bushes. For individuals characterized by the preservation of the main root, weak vegetative growth and reproduction, slow seizure of territory. The complex of data on organizational and population characteristics is analyzed. It is established that the real optimum state of coenopopulations of the studied species is achieved in the petrophytic variants of steppes located on the slopes of mountains. Conditions of highmountain steppe and alpine plant communities are unfavorable for Thymus.
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