Question: Thermopsis rhombifolia could be found in the Great Plains, where do Great Plains could be found in the United States?
Context: The depopulation of the Great Plains refers to the large-scale migration of people from rural areas of the Great Plains of the United States to more urban areas and to the east and west coasts during the 20th century.  This phenomenon of rural-to-urban migration has occurred to some degree in most areas of the United States, but has been especially pronounced in the Great Plains states, including Texas, Oklahoma, Kansas, Nebraska, South Dakota, North Dakota, Montana, Wyoming, Colorado, and New Mexico where many counties have lost more than 60 percent of their former populations. Michael Forsberg is an American photographer.  Many of his photographs depict landscapes and wildlife of the Great Plains.  Some of his work is found in the Great Plains Art Museum of the Center for Great Plains Studies at the University of Nebraska-Lincoln.  From the fall of 2005 to the winter of 2008 he traveled 100,000 miles in 12 states and three Canadian provinces taking the photographs that work appear in "Great Plains: America's Lingering Wild", published by the University of Chicago Press in 2009 (ISBN  ). The High Plains are a subregion of the Great Plains mostly in the Western United States, but also partly in the Midwest states of Nebraska, Kansas, and South Dakota, generally encompassing the western part of the Great Plains before the region reaches the Rocky Mountains.  The High Plains are located in southeastern Wyoming, southwestern South Dakota, western Nebraska, eastern Colorado, western Kansas, eastern New Mexico, western Oklahoma, and south of the Texas Panhandle.  The southern region of the Western High Plains ecology region contains the geological formation known as Llano Estacado which can be seen from a short distance or from on satellite maps.  From east to west, the High Plains rise in elevation from around 1160 ft to over 7800 ft . 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. The Great Plains Shelterbelt was a project to create windbreaks in the Great Plains states of the United States, that began in 1934.  President Franklin D. Roosevelt initiated the project in response to the severe dust storms of the Dust Bowl, which resulted in significant soil erosion and drought.  The United States Forest Service believed that planting trees on the perimeters of farms would reduce wind velocity and lessen evaporation of moisture from the soil.  By 1942, 220 million trees had been planted, stretching out 18600 mi in a 100-mile-wide zone from Canada to the Brazos River.  Even as of 2007 , "the federal response to the Dust Bowl, including the PSFP [Prairie States Forestry Program] which planted the Great Plains Shelterbelt and creation of the Soil Erosion Service, represents the largest and most-focused effort of the [U.S.] government to address an environmental problem". The Northern short grasslands is one of 867 terrestrial ecoregions defined by the World Wide Fund for Nature.  This ecoregion includes parts of the Canadian provinces of Alberta and Saskatchewan, and the American Great Plains states of Montana, North Dakota, Wyoming, South Dakota and Nebraska.  The United States Environmental Protection Agency (EPA) further breaks this ecoregion into the Northwestern Glaciated Plains and Northwestern Great Plains. The Iron Confederacy (or "Confederation", also called in Cree: "Nehiyaw-Pwat" or in English Cree-Assiniboine) was a political and military alliance of Plains Indians of what is now Western Canada and the northern United States.  This confederacy included various individual bands that allied together against common enemies.  The ethnic groups that made up the Confederacy were the branches of the Cree people that moved onto the Great Plains around 1740 (the southern half of this movement eventually became the "Plains Cree" and the northern half the "Woods Cree"), the Saulteaux (Plains Ojibwa), the Assiniboine, and the Assiniboine's Canadian descendants of today, the Nakoda, plus Iroquois and Métis involved in the fur trade.  The Confederacy rose to predominance on the northern Plains during the height of the North American fur trade when they operated as middlemen controlling the flow of European goods to other native nations, and the flow of furs to the Hudson's Bay Company (HBC) and North West Company (NWC) trading posts.  Its peoples later also played a major part in the bison (buffalo) hunt, and the pemmican trade.  The decline of the fur trade and the collapse of the bison herds sapped the power of the Confederacy after the 1860s, and it could no longer act as a barrier to U.S. and Canadian expansion. Plains Indians, Interior Plains Indians or Indigenous people of the Great Plains and Canadian Prairies are the Native American tribes and First Nation band governments who have traditionally lived on the greater Interior Plains (i.e. the Great Plains and the Canadian Prairies) in North America.  Their historic nomadic culture and development of equestrian culture and resistance to domination by the government and military forces of Canada and the United States have made the Plains Indian culture groups an archetype in literature and art for American Indians everywhere. John Udell (22 June 1795 – 30 June 1874) was an American farmer and Baptist lay preacher who is primarily known for two detailed diaries he kept of his travels to California across the Great Plains of the United States.  He traversed the overland route four times between 1850 and 1859, returning by sea on his first three trips.  After his fourth and final trip to California he remained there, settling in Solano County and later in Sonoma County.  His first diary, "Incidents of Travel to California Across the Great Plains", was published in 1856.  His second diary, "Journal of John Udell, Kept During a Trip Across the Plains", was first published in 1859 and is an account of his last trip to California as a member of the Rose-Baley Party. The Great Plains (sometimes simply "the Plains") is the broad expanse of flat land (a plain), much of it covered in prairie, steppe and grassland, that lies west of the Mississippi River tallgrass prairie states and east of the Rocky Mountains in the United States and Canada.  It embraces
Answer: west of the Mississippi River