tarweed

Noun tarweed has 2 senses

• tarweed(n = noun.plant) - any of various resinous glandular plants of the genus Madia; of western North and South America;
is a member of genus madia, madia
has particulars: chile tarweed, madia oil plant, madia sativa, melosa
is a kind of herb, herbaceous plant

• tarweed(n = noun.plant) gum plant, gumweed, rosinweed - any of various western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally; often poisonous to livestock;
is a member of genus grindelia, grindelia
has particulars: grindelia robusta, curlycup gumweed, grindelia squarrosa
is a kind of herb, herbaceous plant