Ricegrass
Oryzopsis hymenoides
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Clade:	Commelinids
Order:	Poales
Family:	Poaceae
Subfamily:	Pooideae
Supertribe:	Stipodae
Tribe:	Stipeae
Genus:	Oryzopsis Michx., 1803
Type species
Oryzopsis asperifolia Michx.
Synonyms [1]
Dilepyrum Raf. 1808, illegitimate name not Michx. 1803

Oryzopsis is a genus of Chinese and North American plants in the grass family. ^{[2] [3] [4]} Species from this genus are commonly called ricegrass. ^[5]

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

Species ^{[1] [6]}

• Oryzopsis asperifolia Michx. – roughleaf ricegrass ^[7] - Canada (all 10 provinces plus Yukon + Northwest Territories), United States ( Northeast, Great Lakes, Black Hills, Rocky Mountains) ^[8]
• Oryzopsis chinensis Hitchc. - China
• Oryzopsis contracta (B.L.Johnson) Schltr. - Colorado, Wyoming, Montana
• Oryzopsis exigua Thurb. - Wyoming
• Oryzopsis hendersonii Vasey - Oregon, Idaho, Washington state
• Oryzopsis holciformis (M.Bieb.) Hack. (syn. Piptatherum holciforme (M.Bieb.) Roem. & Schult.) - Israel
• Oryzopsis hymenoides (Roem. & Schult.) Ricker ex Piper - western North America from British Columbia + Alberta to California + New Mexico
• Oryzopsis pungens (Torr.) Hitchc. - Canada, northern United States
• Oryzopsis swallenii C.L.Hitchc.& Spellenb. - Idaho, Wyoming

formerly included ^[1]

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

References