Features of the population structure of the rare species Tanacetum achilleifolium (Samara region)

The features of 24 coenopopulations of Tanacetum achilleifolium (M. Bieb.) Sch. Bip. (Asteraceae) at six points in the Samara, Saratov and Orenburg regions (Russia). The features of the spatial-ontogenetic structure of cenopopulations were determined, differences in the indicators of cenopopulations under different conditions (absence of anthropogenic load, recreation, grazing, fires) were revealed.