This volume publishes for the first time specific data for Siberia on taxonomy, chorology, ecological affinity of the species of 13 families of dicotyledonous plants: Solanaceae, Scrophulariaceae, Orobanchaceae, Lentibulariaceae, Plantaginaceae, Rubiaceae, Caprifoliaceae, Adoxaceae, Valerianaceae, Dipsacaceae, Cucuribitaceae, Campanulaceae and Lobeliaceae. Dichotomous keys have been drawn for genera and species. The text has been illustrated with maps of the geographic distribution of most of the species and with their original sketches. The book is meant for botanists, ecologists, biologists, geographers, agricultural and forestry workers, and nature conservationists.