[syn: gumweed, gum plant, tarweed, rosinweed]
The Collaborative International Dictionary of English v.0.48:
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.
WordNet (r) 3.0 (2006):
n 1: North American perennial having a resinous odor and yellow
flowers [syn: rosinweed, Silphium laciniatum]
2: 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,