North American perennial having a resinous odor and yellow flowers [syn: rosinweed, Silphium laciniatum]
noun
Any of various western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally; often poisonous to livestock [syn: gumweed, gum plant, tarweed, rosinweed]
Rosinweed \Ros"in*weed`\, n. (Bot.)
(a) The compass plant. See under Compass.
(b) A name given in California to various composite plants
which secrete resins or have a resinous smell.
[1913 Webster]
