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.
Thermopsis villosa Thermopsis villosa, or Aaron's rod, is an herbaceous plant in the legume family. Its native range is in North America, in the southern Appalachian mountains. It is found elsewhere as an escape from cultivation.