gumweed


From The Collaborative International Dictionary of English v.0.48:

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]
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