Any of various western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally, often poisonous to livestock
English: gumweed, gum plant, tarweed, rosinweed
tarweedEnglish
tarweed, gum plant, gumweed, rosinweed
Noun
Any of various resinous glandular plants of the genus Madia, of western North and South America
English: tarweed