The family Cyperaceae is extensively distributed throughout the world. It includes some 90 genera and 4000 species. In terms of abundance, this family occupies the 11th place in the flora of the erstwhile USSR as a whole and third place in Siberia where 13 genera and 232 species and subspecies have been reported. The most profuse among these is genus "Carex" L. (sedge) comprising 173 species and subspecies that can be grouped into 39 sections under four subgenera. Scientists at the taxonomy laboratory of higher plants and florogenetics, Siberian Central Botanical Garden, Siberian Division of USSR Academy of Sciences, carried out the scientific treatment of material presented in this volume.
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