This volume presents the most recent data on systematics and chorology Oenothera bringing together contributions from researchers studying this group of plants in Eastern Europe. The book is divided into three parts. The first part deals with general considerations whilst the second part concerns history and distribution of Oenothera species in: Estonia, Latvia, Lithuania, Belarus, Ukraine, Russia and Moldova. There is also list of numerous references and appendix containing coloured photos of the Oenothera species.