This volume publishes for the first time specific data for Siberia on taxonomy and distribution of feral members of 18 families. The largest families Lamiaceae (Labiatae). Diagnostic features, conditions of habitation, and geographic distribution, with maps of distribution ranges in many cases, have been provided for each species and subspecies. This information forms an essential scientific basis for conservation and utilization of the resources of the plant kingdom. The book is designed for the use of botanists specializing in various branches including resource specialists and plant introducers, specialists in environmental conservation, agronomers, teachers and students.