⚠ Version 1 of The Plant List has been superseded.
This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Roegneria japonensis in version 1.1 of The Plant List.
This name is a synonym of Elymus ciliaris var. hackelianus .
The record derives from Tropicos which reports it as a synonym (record 25541027
) with original publication details: Claves Gen. Sp. Gram. Prim. Sinic. 71, 186 71 1957.