WordNet (r) 3.0 (2006):

brittle bush
    n 1: fragrant rounded shrub of southwestern United States and
         adjacent Mexico having brittle stems and small crowded
         blue-green leaves and yellow flowers; produces a resin used
         in incense and varnish and in folk medicine [syn:
         brittlebush, brittle bush, incienso, Encelia
         farinosa]