Thermopsis rhombifolia

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Thermopsis rhombifolia
Thermopsis rhombifolia NPS.jpg
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,[1] golden bean, buffalo bean, wet tooth, and buffalo flower, is a hardy perennial native to the North American plains. [1]

A member of the pea family, it grows in grassland, hillsides, and patchy woodland areas to a height of about 30 cm, and produces bright yellow golden flowers about a centimetre long. 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.[2]

This plant is a beautiful addition to an early spring garden, but is extremely aggressive and must be contained[citation needed].


  1. ^ "Thermopsis rhombifolia". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 9 December 2015. 
  1. ^ Stories and Spaces - Buffalo Bean Retrieved 25 April 2006
  2. ^ Case series of Thermopsis exposure Retrieved 25 April 2006

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