The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
plants, such as Linaria cretacea and Silene cretacea, which develop well on chalk outcroppings. They belong to the group of calcicoles. Chalk plants are found along the lower courses of the Don, Donets, Volga, and other rivers.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.