Estimation of state of Sedum L. (Crassulaceae DC.) coenopopulations in the North

The results of complex investigations of Sedum acre L. and Hylotelephium triphyllum (Haw) Holub., two species from Crassulaceae DC. family in the northern boundary of its distribution within taiga subzone of the Komi Republic, are generalized. Original material on population characteristics (age structure, seed production, population density and number) are obtained. Data on modern state of studied species of coenopopulations are considered. The basic age spec-trum and ecological characteristics of these species habitats are presented.