Gumweed

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  gumweed \gumweed\ n.
     any of various Western American plants of the genus
     {Grindelia} having resinous leaves and stems formerly used
     medicinally; often poisonous to livestock.
  
     Syn: gum plant, tarweed, rosinweed, rosin-weed.


          [WordNet 1.5]

From WordNet (r) 2.0 [wn]:

  gumweed
       n : any of various western American plants of the genus
           Grindelia having resinous leaves and stems formerly used
           medicinally; often poisonous to livestock [syn: {gum
           plant}, {tarweed}, {rosinweed}]