Oryzopsis Explained

Oryzopsis is a genus of Chinese and North American plants in the grass family.^{[1] [2] [3]} Species from this genus are commonly called ricegrass.^[4]

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

Species^[5]

• Oryzopsis asperifolia – roughleaf ricegrass ^[6] - Canada (all 10 provinces plus Yukon + Northwest Territories), United States (Northeast, Great Lakes, Black Hills, Rocky Mountains)^[7]
• Oryzopsis chinensis - China
• Oryzopsis contracta - Colorado, Wyoming, Montana
• Oryzopsis exigua - Wyoming
• Oryzopsis hendersonii - Oregon, Idaho, Washington state
• Oryzopsis holciformis (syn. Piptatherum holciforme (M.Bieb.) Roem. & Schult.) - Israel
• Oryzopsis hymenoides - western North America from British Columbia + Alberta to California + New Mexico
• Oryzopsis pungens - Canada, northern United States
• Oryzopsis swallenii - Idaho, Wyoming

formerly includednumerous 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

Notes and References

1. https://www.biodiversitylibrary.org/page/404812#page/72/mode/1up Michaux, André 1803. Flora Boreali-Americana 1: 51
2. https://www.biodiversitylibrary.org/page/404812#page/71/mode/1up Michaux, André 1803. Flora Boreali-Americana 1: plate 9
3. http://www.tropicos.org/Name/40034338 Tropicos, Oryzopsis Michx.
4. http://plants.usda.gov/java/profile?symbol=ORYZO Oryzopsis
5. http://www.theplantlist.org/tpl1.1/search?q=Oryzopsis The Plant List search for Oryzopsis
6. http://plants.usda.gov/java/profile?symbol=ORAS Oryzopsis asperifolia
7. http://bonap.net/MapGallery/County/Oryzopsis%20asperifolia.png Biota of North American Biota Program 2013 county distribution map