The Collaborative International Dictionary of English v.0.48:

frijolillo \frijolillo\, frijolito \frijolito\n.
   A shrub or small tree(Sophora secundiflora) having pinnate
   leaves poisonous to livestock and dense racemes of intensely
   fragrant blue flowers and red beans.

   Syn: mescal bean, coral bean, Sophora secundiflora.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

frijolito
    n 1: shrub or small tree having pinnate leaves poisonous to
         livestock and dense racemes of intensely fragrant blue
         flowers and red beans [syn: mescal bean, coral bean,
         frijolito, frijolillo, Sophora secundiflora]