Apios tuberosa

from WordNet (r) 3.0 (2006)

Apios tuberosa
    n 1: a North American vine with fragrant blossoms and edible
         tubers; important food crop of Native Americans [syn:
         {groundnut}, {groundnut vine}, {Indian potato}, {potato
         bean}, {wild bean}, {Apios americana}, {Apios tuberosa}]

from The Collaborative International Dictionary of English v.0.48

Groundnut \Ground"nut`\ (ground"n[u^]t`), n. (Bot.)
   (a) The fruit of the {Arachis hypog[ae]a} (native country
       uncertain); the peanut; the earthnut.
   (b) A leguminous, twining plant ({Apios tuberosa}), producing
       clusters of dark purple flowers and having a root
       tuberous and pleasant to the taste.
   (c) The dwarf ginseng ({Aralia trifolia}). [U. S.] --Gray.
   (d) A European plant of the genus {Bunium} ({B. flexuosum}),
       having an edible root of a globular shape and sweet,
       aromatic taste; -- called also {earthnut}, {earth
       chestnut}, {hawknut}, and {pignut}.
       [1913 Webster]