The Collaborative International Dictionary of English v.0.48:

Lupine \Lu"pine\, n. [L. lupinus, lupinum, apparently fr.
   lupinus belonging to a wolf, fr. lupus a wolf; perh. so
   called because it was supposed to exhaust the soil: cf. F.
   lupin. Cf. Wolf.] (Bot.)
   A leguminous plant of the genus Lupinus, especially
   Lupinus albus, the seeds of which have been used for food
   from ancient times. The common species of the Eastern United
   States is Lupinus perennis. There are many species in
   California.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Lupinus perennis
    n 1: stout perennial of eastern and central North America having
         palmate leaves and showy racemose blue flowers [syn: wild
         lupine, sundial lupine, Indian beet, old-maid's
         bonnet, Lupinus perennis]