⚠ Version 1 of The Plant List has been superseded.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 Agropyron richardsonii in version 1.1 of The Plant List.
This name is a synonym of Elymus trachycaulus .
The record derives from Tropicos which reports it as a synonym (record 25501439
) with original publication details: Linnaea 12(4): 467 467 1838.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:385211-1
.