It is native to North America, where it is found in the Great Plains, with extensions into the lower canyons of the Rocky Mountains.

[3][4] It is a perennial herb that produces yellow flowers in the spring.

[5] The flowers were commonly used by the natives as a source of yellow dye and were boiled in a tea as a cure for stomach ailments for people and horses.

The plant has toxic properties if ingested; symptoms of poisoning include vomiting, dizziness, and abdominal pain.

[6] Media related to Thermopsis rhombifolia at Wikimedia Commons