⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record kew-411103, with some changes.

Elymus difformis Nutt. ex J.G.Sm. is a synonym of Sitanion hystrix (Nutt.) J.G.Sm.

This name is a synonym of Sitanion hystrix (Nutt.) J.G.Sm..

The record derives from WCSP which reports it as a synonym and as an invalid name (record 411103) with original publication details: Bull. Div. Agrostol. U.S.D.A. 18: 15 (1889.