Thermopsis rhombifolia could be found in the Great Plains, where do Great Plains could be found in the United States?
Thermopsis rhombifolia Thermopsis rhombifolia, also known as prairie thermopsis, is a flowering plant in the legume family. It is native to Canada and the United States, where it is found in the Great Plains, with extensions into the lower canyons of the Rocky Mountains. Its natural habitat is dry grasslands and woodlands.
Poa arida Poa arida is a species of grass known by the common names plains bluegrass and prairie speargrass. It is native to North America, where it occurs throughout western and central Canada and the central United States. It is most common east of the Continental Divide; specimens west are often misidentifications.