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Title: Achnatherum  
Author: World Heritage Encyclopedia
Language: English
Subject: List of Poaceae genera, Flora of New Zealand, John Day Fossil Beds National Monument, Oryzopsis hymenoides, Pooideae, Needlegrass, List of plants on the Modoc National Forest
Publisher: World Heritage Encyclopedia


Achnatherum parishii
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Monocots
(unranked): Commelinids
Order: Poales
Family: Poaceae
Subfamily: Pooideae
Genus: Achnatherum
P. Beauv.

about 100-300 species, see text

Achnatherum is a genus of plants which includes several species of needlegrass.[1] Several needlegrass species have been switched between Achnatherum and genus Stipa; taxonomy between the two closely related genera is still uncertain.

Achnatherum hymenoides was useful as a food source to Native Americans. Achnatherum brachychaetum is best known as a noxious weed.

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


  • CRC World Dictionary of Grasses - Common Names, Scientific Names, Eponyms, Synonyms, and Etymology - Volume I (A - D), by Umberto Quattrocchi, ISBN 978-0-8493-1303-5

External links

  • USDA Plants Profile
  • Genus key
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