This name is a synonym of Elymus tsukushiensis Honda.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 411269) with original publication details: Bull. Nanjing Bot. Gard. 1987: 9 1988.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:945702-1.
This name was in version 1 of The Plant List, record kew-411269.