Elymus × saxicola Scribn. & J.G.Sm., Bull. Div. Agrostol. U.S.D.A. 11: 56 (1898).
Homotypic Names:
- Agropyron × saxicola (Scribn. & J.G.Sm.) Piper, Contr. U.S. Natl. Herb. 11: 148 (1906).
- × Agrositanion saxicola (Scribn. & J.G.Sm.) Bowden, Canad. J. Bot. 45: 720 (1967).
- × Pseudelymus saxicola (Scribn. & J.G.Sm.) Barkworth & D.R.Dewey, Great Basin Naturalist 43: 570 (1983).
Heterotypic Synonyms:
- Sitanion × flexuosum Piper, Erythea 7: 99 (1899).
- Sitanion × insulare J.G.Sm., Bull. Div. Agrostol. U.S.D.A. 18: 14 (1899).
- Sitanion × lanceolatum J.G.Sm., Bull. Div. Agrostol. U.S.D.A. 18: 20 (1899).
- Agropyron × flexuosum (Piper) Piper, Proc. Biol. Soc. Washington 18: 149 (1905).
- Agropyron × sitanioides J.G.Sm. ex Piper, Proc. Biol. Soc. Washington 18: 149 (1905).
- Agropyron × subvillosum Piper, Contr. U.S. Natl. Herb. 11: 148 (1906), nom. superfl.
- Elymus × insularis (J.G.Sm.) M.E.Jones, Contr. W. Bot. 14: 20 (1912).