Piptochaetium, or speargrass, is a genus of plants in the grass family, native to North and South America. Piptochaetium is a bunchgrass genus in the tribe Stipeae. Some of its species have been included in the genus Stipa by some authors. see Nassella Stipa • Piptochaetium collinum - Nassella laevissima • Piptochaetium gibbum - Nassella gibba • Piptochaetium laeve - Nassella pubiflora • Piptochaetium laevissimum - Nassella laevissima • Piptochaetium mexicanum - Nassella mexicana • Piptochaetium mucronatum - Nassella mucronata • Piptochaetium ovatum - Stipa ovata • Piptochaetium trichotomum - Nassella trichotoma