Stipa columbiana subsp. nelsonii (Scribn.) H.St.John subspecies synonym

Eriocoma membranacea Steudel species synonym

Stipa contracta (B.L.Johnson) W.A.Weber species heterotypic synonym

Oryzopsis contracta (B.L.Johnson) Schechter species synonym

Eriocoma parishii (Vasey) Romasch. species accepted

Eriocoma hendersonii (Vasey) Romasch. species accepted

Eriocoma nevadensis (B.L.Johnson) Romasch. species accepted

Eriocoma latiglumis (Swallen) Romasch. species accepted

Eriocoma bracteata (Swallen) Romasch. species accepted

Eriocoma richardsonii (Link) Romasch. species accepted

Eriocoma coronata (Thurb.) Romasch. species accepted

Eriocoma scribneri (Vasey) Romasch. species accepted

Eriocoma perplexa (Hoge & Barkworth) Romasch. species accepted

Eriocoma thurberiana (Piper) Romasch. species accepted

Eriocoma curvifolia (Swallen) Romasch. species accepted

Eriocoma ×bloomeri (Bol.) Romasch. species accepted

Eriocoma lemmonii (Vasey) Romasch. species accepted

Eriocoma lettermanii (Vasey) Romasch. species accepted

Eriocoma arida (M.E.Jones) Romasch. species accepted

Eriocoma robusta (Vasey) Romasch. species accepted

Eriocoma contracta (B.L.Johnson) Romasch. species accepted

Eriocoma pinetorum (M.E.Jones) Romasch. species accepted

Eriocoma valdesii Hoge ex Romasch., P.M.Peterson & Soreng species accepted

Eriocoma valdesii Hoge species homotypic synonym

Stipa viridula var. lettermanii (Vasey) Vasey variety synonym

Oryzopsis hymenoides var. hymenoides variety synonym

Stipa coronata subsp. parishii (Vasey) Hitchc. subspecies synonym

Stipa columbiana var. columbiana variety synonym

Eriocoma cuspidata Nutt. species synonym

Stipa occidentalis Thurb. ex Torr. species synonym

Oryzopsis membranacea Vasey species synonym

Oryzopsis exigua var. hendersonii (Vasey) M.E.Jones variety synonym

Oryzopsis cuspidata (Nutt.) Benth. ex Vasey species synonym

Fendleria rhynchelytroides Steud. species synonym

Stipa viridula var. robusta Vasey variety synonym

Stipa viridula var. minor Vasey variety synonym

Stipa stricta var. sparsiflora Vasey variety synonym

Stipa richardsonii var. major Macoun variety synonym

Oryzopsis richardsonii (Link) Beal species synonym

Stipa pringlei var. lemmonii Vasey variety synonym

Stipa parishii Vasey species synonym

Stipa occidentalis var. nelsonii (Scribn.) C.L.Hitchc. variety synonym

Stipa occidentalis var. montana Merr. & Burtt Davy variety synonym

Stipa occidentalis var. minor (Vasey) C.L.Hitchc. variety synonym

Stipa mormonum Mez species synonym

Stipa minor (Vasey) Scribn. species synonym

Stipa membranacea Pursh species heterotypic synonym

Stipa lemmonii (Vasey) Scribn. species synonym

Achnatherum wallowaense J.R.Maze & K.A.Robson species synonym

Achnatherum latiglumis (Swallen) Barkworth, 1993 species synonym

Achnatherum bracteatum (Swallen) Valdés-Reyna & Barkworth species synonym

Achnatherum arnowiae (S.L.Welsh & N.D.Atwood) Barkworth species synonym

Achnatherum altum (Swallen) Hoge & Barkworth species synonym

Stipa coronata var. parishii (Vasey) S.L.Welsh variety synonym

Stipa bracteata Swallen species synonym

Stipa arnowiae S.L.Welsh & N.D.Atwood species synonym

Stipa alta Swallen species synonym

Milium cuspidatum (Nutt.) Spreng. species synonym

Urachne lanata Trin. species synonym

Achnatherum curvifolium (Swallen) Barkworth species synonym

Stipa curvifolia Swallen species synonym

Achnatherum webberi (Thurb.) Barkworth species synonym

Stipa webberi (Thurb.) B.L.Johnson species synonym

Oryzopsis webberi (Thurb.) Benth. ex Vasey species synonym

Achnatherum hendersonii (Vasey) Barkworth species synonym

Oryzopsis hendersonii Vasey species synonym

Stipa hendersonii (Vasey) Mehlenb. species synonym

Achnatherum lobatum (Swallen) Barkworth species synonym

Stipa lobata Swallen species synonym

Achnatherum occidentale (Thurb. ex S.Watson) Barkworth species synonym

Achnatherum perplexum Hoge & Barkworth species synonym

Stipa perplexa (Hoge & Barkworth) Wipff & S.D.Jones species synonym

Achnatherum ×bloomeri (Bol.) Barkworth species synonym

Stipa ×bloomeri Bol. species synonym

Oryzopsis bloomeri (Bol.) Ricker species synonym

×Stiporyzopsis bloomeri (Bol.) B.L.Johnson species synonym

Achnatherum richardsonii (Link) Barkworth species synonym

Stipa richardsonii Link species synonym

Achnatherum coronatum (Thurb.) Barkworth species synonym

Stipa coronata Thurb. species synonym

Stipa coronata var. coronata variety synonym

Achnatherum thurberianum (Piper) Barkworth species synonym

Stipa thurberiana Piper species synonym

Achnatherum latiglume (Swallen) Barkworth species synonym

Stipa latiglumis Swallen species synonym

Achnatherum lettermanii (Vasey) Barkworth species synonym

Stipa lettermanii Vasey species synonym

Achnatherum nevadense (B.L.Johnson) Barkworth species synonym

Stipa nevadensis B.L.Johnson species synonym

Achnatherum parishii (Vasey) Barkworth species synonym

Achnatherum aridum (M.E.Jones) Barkworth species synonym

Stipa arida M.E.Jones species synonym

Achnatherum scribneri (Vasey) Barkworth species synonym

Stipa scribneri Vasey species synonym

Achnatherum contractum (B.L.Johnson) Barkworth species synonym

Oryzopsis contracta (B.L.Johnson) Schltr. species synonym

Oryzopsis hymenoides var. contracta B.L.Johnson variety synonym

Achnatherum swallenii (C.L.Hitchc. & Spellenb.) Barkworth species synonym

Oryzopsis swallenii C.L.Hitchc. & Spellenb. species synonym

Achnatherum hymenoides (Roem. & Schult.) Barkworth species synonym

Stipa hymenoides Roem. & Schult. species synonym

Oryzopsis hymenoides (Roem. & Schult.) Ricker ex Piper species synonym

Achnatherum lemmonii (Vasey) Barkworth species synonym

Achnatherum nelsonii (Scribn.) Barkworth species synonym

Achnatherum pinetorum (M.E.Jones) Barkworth species synonym

Stipa pinetorum M.E.Jones species synonym

Achnatherum robustum (Vasey) Barkworth species synonym

Stipa vaseyi Scribn. species synonym

Stipa robusta (Vasey) Scribn. species heterotypic synonym

Achnatherum wallowaensis Maze & K.A.Robson species synonym

Stipa nelsonii Scribn. species synonym

Stipa thurberana Piper species synonym

Stipa occidentalis Thurb. ex S.Watson species heterotypic synonym

Stipa occidentalis Thurb. species heterotypic synonym

Oryzopsis contracta (B.L.Johnson) Shechter species synonym

Eriocoma lobata (Swallen) Romasch. species accepted

Eriocoma alta (Swallen) Romasch. species accepted

Eriocoma occidentalis (Thurb. ex S.Watson) Romasch. species accepted

Eriocoma wallowaensis (J.R.Maze & K.A.Robson) Romasch. species accepted

Eriocoma swallenii (C.L.Hitchc. & Spellenb.) Romasch. species accepted

Eriocoma arnowiae (S.L.Welsh & N.D.Atwood) Romasch. species accepted

Eriocoma nelsonii (Scribn.) Romasch. species accepted

Eriocoma webberi Thurb. species accepted

Eriocoma membranacea (Vasey) Beal species synonym

Eriocoma hymenoides (Roem. & Schult.) Rydb. species accepted

Stipa columbiana var. nelsonii (Scribn.) Hitchc. variety synonym

Oryzopsis hymenoides (Roem. & Schult.) Ricker species synonym

Achnatherum lobatum (Swallen) Z.L.Wu, 1996 species synonym

Stipa coronata var. parishii (Vasey) Hitchc. variety synonym

Oryzopsis ×bloomeri (Bol.) Ricker ex Piper species synonym

Oryzopsis webberi (Thurb.) Benth. species homotypic synonym

Oryzopsis cuspidata (Nutt.) Benth. species homotypic synonym