Oryzopsis

Ricegrass
Oryzopsis hymenoides
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Clade:	Commelinids
Order:	Poales
Family:	Poaceae
Subfamily:	Pooideae
Supertribe:
Tribe:	Stipeae
Genus:	Oryzopsis Michx., 1803
Type species
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]

• Michx. – roughleaf ricegrass ^[7] - Canada (all 10 provinces plus Yukon + Northwest Territories), United States (Northeast, Great Lakes, Black Hills, Rocky Mountains)^[8]
• Hitchc. - China
• (B.L.Johnson) Schltr. - Colorado, Wyoming, Montana
• Thurb. - Wyoming
• 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
• (Torr.) Hitchc. - Canada, northern United States
• (Sm.) Ricker ex Hitchc. - eastern Canada, northeastern + north-central United States
• 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 Anemanthele Eriocoma Nassella Piptatherum Piptatheropsis Piptochaetium Ptilagrostis Stipa

References[]