Piptatheropsis is a genus of plants in the grass family.Piptatheropsis is a newly recognized genus, named in 2011, comprising species formerly considered members of Milium, Oryzopsis, Piptatherum, Stipa, and similar genera.Species Piptatheropsis canadensis (Poir.) Romasch., P.M.Peterson & Soreng - Canada (BC to LAB), northeastern USA (ME NH NY MI WI MN WV) Piptatheropsis exigua (Thurb.) Romasch., P.M.Peterson & Soreng - western North America (ABT BC CO ID MT OR WA WY CAL NV UT) Piptatheropsis micrantha (Trin.