(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
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
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 ]