tar weed

名词 tar weed:

1. any of various resinous glandular plants of the genus Madia; of western North and South America
   同义词：tarweed
2. any of various western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally; often poisonous to livestock
   同义词：gumweed, gum plant, tarweed, rosinweed