What is "rosinweed"

Rosinweed \Ros"in*weed`\, n. (Bot.)

1. The compass plant. See under Compass.

2. A name given in California to various composite plants which secrete resins or have a resinous smell.

n. 1 The compass plant. 2 (context US California English) Any of various composite plants which secrete resins or have a resinous smell.

1. n. North American perennial having a resinous odor and yellow flowers [syn: 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, tarweed]