NOUN (2)

1. a plant of the genus Haplopappus;

2. any of various much-branched yellow-flowered shrubs of the genus Chrysothamnus; western North America;

The Collaborative International Dictionary of English v.0.48:

goldenbush \gold"en*bush`\ n.
   A plant of the genus Haplopappus.
   [WordNet 1.5]

   2. Any of various much-branched yellow-flowered shrubs of the
      genus Chrysothamnus, growing in Western North America.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

goldenbush
    n 1: a plant of the genus Haplopappus
    2: any of various much-branched yellow-flowered shrubs of the
       genus Chrysothamnus; western North America