New varieties of Elymus ciliaris (Poaceae: Triticeae) from the Russian Far East

According to the results of an experimental study of the closely related species Elymus ciliaris and E. amurensis growing in the Russian Far East, Elymus ciliaris should be considered as a single polymorphic species comprising four varieties, including var. amurensis. Two varieties are described for the first time. Descriptions and photographs of the typal specimens are given.