Golden bean

Thermopsis rhombifolia
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Rosids
Order:	Fabales
Family:	Fabaceae
Genus:	Thermopsis
Species:	T. rhombifolia
Binomial name
Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richardson

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.

It is a perennial that produces yellow flowers in the spring.

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.

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Wikipedia