Selected Species
- Achnatherum acutum (Swallen) Valdés-Reyna & Barkworth
- Achnatherum aridum (M.E.Jones) Barkworth - Mormon needlegrass
- Achnatherum bloomeri (Boland.) Barkworth - Bloomer's ricegrass
- Achnatherum bromoides (L.) P. Beauv.
- Achnatherum brachychaetum (Godr.) Barkworth - punagrass
- Achnatherum calamagrostis (Stipa calamagrostis) (L.) Beauv. - Spear grass, Needle Grass, Silver Spike Grass
- Achnatherum capense (L.) P. Beauv.
- Achnatherum caragana (Trin. & Rupr.) Nevski
- Achnatherum caudatum (Trin.) S. L. W. Jacobs & J. Everett - Chilean ricegrass
- Achnatherum clandestinum (Hack.) Barkworth - Mexican ricegrass
- Achnatherum contractum (B.L. Johnson) Barkworth - contracted ricegrass
- Achnatherum coronatum (Thurb.) Barkworth - crested needlegrass
- Achnatherum curvifolium (Swallen) Barkworth - Guadalupe ricegrass
- Achnatherum diegoense (Swallen) Barkworth - San Diego needlegrass
- Achnatherum duthiei (Hook.f.) P.C. Kuo & S.L. Lu
- Achnatherum editorum (E. Fourn.) Valdés-Reyna & Barkworth
- Achnatherum eminens (Cav.) Barkworth - southwestern needlegrass
- Achnatherum hendersonii (Vasey) Barkworth - Henderson's needlegrass
- Achnatherum hymenoides (Oryzopsis hymenoides) Ricker ex Piper - Indian ricegrass
- Achnatherum latiglume (Swallen) Barkworth - wide-glumed needlegrass
- Achnatherum lemmonii (Vasey) Barkworth - Lemmon's needlegrass
- Achnatherum lettermanii (Vasey) Barkworth - Letterman's needlegrass
- Achnatherum lobatum (Swallen) Barkworth - lobed needlegrass
- Achnatherum nelsonii (Scribn.) Barkworth - Nelson's needlegrass, Dore's needlegrass
- Achnatherum nevadense (B.L. Johnson) Barkworth - Nevada needlegrass
- Achnatherum occidentale (Thurb.) Barkworth - western needlegrass
- Achnatherum parishii (Vasey) Barkworth - Parish's needlegrass
- Achnatherum perplexum Hoge & Barkworth - perplexing needlegrass
- Achnatherum pinetorum (M.E. Jones) Barkworth - pinewoods needlegrass
- Achnatherum richardsonii (Link) Barkworth - Richardson's needlegrass
- Achnatherum robustum (Vasey) Barkworth - sleepygrass
- Achnatherum scribneri (Vasey) Barkworth - Scribner needlegrass
- Achnatherum speciosum Trin. & Rupr. - desert needlegrass
- Achnatherum splendens (Trin.) Nevski
- Achnatherum stillmanii (Bol.) Barkworth - Stillman's needlegrass
- Achnatherum thurberianum (Piper) Barkworth - Thurber's needlegrass
- Achnatherum swallenii (C.L. Hitchc. & Spellenb.) Barkworth - Swallen's needlegrass
- Achnatherum webberi (Thurb.) Barkworth - Webber needlegrass
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