Abstract
The ontogenetic structure of the Bergenia crassifolia (L.) Fritsch, cenopopulation studied at altitudes of 100, 600, and 1200 m above sea level in the Tunkinsky District, Republic of Buryatia. In the studied population sites, the most predominant ontogeny stage was virginile, among which the highest percentage was vegetative plants. Our results showed that Bergenia crassifolia populations at altitudes of 100 and 1200 m above sea level are normal and complete. The population at the altitude 600 m above sea level can be considered normal, although not complete due to the lack of seedlings, juvenile and immature individuals. Bergenia crassifolia population self-sustaining is the result of seed and/or vegetative reproduction.
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