Oryzopsis

{{Short description|Genus of grasses}}

{{Italic title}}

{{Automatic taxobox

|name = Ricegrass

|image = Achnatherum_hymenoides_-_Ricegrass.jpg

|image_caption = Oryzopsis hymenoides

|display_parents = 3

|taxon = Oryzopsis

|authority = Michx., 1803

|type_species_authority = Michx.

|type_species = Oryzopsis asperifolia

|synonyms_ref = [http://apps.kew.org/wcsp/namedetail.do?name_id=426734 Kew World Checklist of Selected Plant Families]

|synonyms =

• Dilepyrum Raf. 1808, illegitimate name not Michx. 1803

}}

Oryzopsis is a genus of Chinese and North American plants in the grass family.[https://www.biodiversitylibrary.org/page/404812#page/72/mode/1up Michaux, André 1803. Flora Boreali-Americana 1: 51] in Latin[https://www.biodiversitylibrary.org/page/404812#page/71/mode/1up Michaux, André 1803. Flora Boreali-Americana 1: plate 9] line drawing of Oryzopsis asperifolia[http://www.tropicos.org/Name/40034338 Tropicos, Oryzopsis Michx.] Species from this genus are commonly called ricegrass.[https://plants.usda.gov/java/profile?symbol=ORYZO Oryzopsis] USDA Plants Database (24 Nov 2011)

The name alludes to the resemblance between this genus and true rice, Oryza.

; Species[http://www.theplantlist.org/tpl1.1/search?q=Oryzopsis The Plant List search for Oryzopsis]

• Oryzopsis asperifolia {{small|Michx.}} – roughleaf ricegrass [https://plants.usda.gov/java/profile?symbol=ORAS Oryzopsis asperifolia] USDA Plants Database (24 Nov 2011) - Canada (all 10 provinces plus Yukon + Northwest Territories), United States (Northeast, Great Lakes, Black Hills, Rocky Mountains)[http://bonap.net/MapGallery/County/Oryzopsis%20asperifolia.png Biota of North American Biota Program 2013 county distribution map]
• Oryzopsis chinensis {{small|Hitchc.}} - China
• Oryzopsis contracta {{small|(B.L.Johnson) Schltr.}} - Colorado, Wyoming, Montana
• Oryzopsis exigua {{small|Thurb.}} - Wyoming
• Oryzopsis hendersonii {{small|Vasey}} - Oregon, Idaho, Washington state
• Oryzopsis holciformis {{small|(M.Bieb.) Hack.}} (syn. Piptatherum holciforme (M.Bieb.) Roem. & Schult.) - Israel
• Oryzopsis hymenoides {{small|(Roem. & Schult.) Ricker ex Piper}} - western North America from British Columbia + Alberta to California + New Mexico
• Oryzopsis pungens {{small|(Torr.) Hitchc.}} - Canada, northern United States
• Oryzopsis swallenii {{small|C.L.Hitchc.& Spellenb.}} - Idaho, Wyoming

; formerly included

numerous species once regarded as members of Oryzopsis but now considered better suited to other genera: Achnatherum Achnella Anemanthele Eriocoma Nassella Piptatherum Piptatheropsis Piptochaetium Ptilagrostis Stipa Stiporyzopsis