partridge pea

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An annual plant (Chamaecrista fasciculata) in the pea family, native to eastern and central North America, having yellow flowers and leaves with numerous leaflets that fold when touched.

from The Century Dictionary.

• noun See pea.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun tropical American plant having leaflets somewhat sensitive to the touch; sometimes placed in genus Cassia