ABSTRACT
For the first time this volume provides accurate data on taxonomy and chorology of species of the largest families of Compositae in the Holarctic. These species account for more than 12% of the species in the flora of the region and comprise 92 genera and 558 species in Siberia. Some of them are new and are being described for the first time. Differences in nomenclature and taxonomy from the already known data have been cited. Keys for genera and species and brief diagnostic features have been given. Chromosome numbers of species have been given based on original or available data. Most of the species have been illustrated afresh and their exact distribution ranges mapped.
