The Collaborative International Dictionary of English v.0.48:

lespedeza \lespedeza\ n.
   Any shrubby or herbaceous plant of the genus Lespedeza,
   widely used for forage, soil improvement, and especially hay
   in the Southern U.S.

   Syn: bush clover.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

lespedeza
    n 1: shrubby or herbaceous plants widely used for forage, soil
         improvement, and especially hay in southern United States
         [syn: bush clover, lespedeza]