Oryzopsis is a genus of Chinese and North American plants in the grass family. Species from this genus are commonly called ricegrass. The name alludes to the resemblance between this genus and true rice, Oryza. 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