Quick definitions from WordNet (brittlebush)
▸ noun: 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
▸ noun: 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