Metcalfe bean

noun
Met·​calfe bean | \ˈmetˌkaf-, -kəf-, -ˌkȧf\

Definition of Metcalfe bean 

1 : a prostrate perennial bean (Phaseolus metcalfei) of the southwestern U.S. and adjacent Mexico that is sometimes cultivated for forage

2 : the flat circular brownish black seed of the Metcalfe bean

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History and Etymology for Metcalfe bean

after J. K. Metcalfe who introduced it to the southwestern U.S. in the late 19th century

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