an Entity references as follows:
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 - * Piptochaetium gibbum - * Piptochaetium laeve - * Piptochaetium laevissimum - * Piptochaetium mexicanum - * Piptochaetium mucronatum - * Piptochaetium ovatum - * Piptochaetium trichotomum - Nassella trichotoma