Family: Poaceae
[Elymus hansenii Scribner, more..., Elymus leckenbyi (Piper) Piper, Sitanion anomalum J.G. Sm., Sitanion hansenii (Scribn.) J.G. Sm., Sitanion leckenbyi Piper, Sitanion planifolium J.G. Sm., Sitanion rubescens Piper, Sitanion x hansenii (Scribn.) J.G. Smith (pro sp.), x Elysitanion hansenii (Scribn.) Bowden]
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