ROSINWEED
gumweed, gum plant, tarweed, rosinweed
(noun) any of various western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally; often poisonous to livestock
rosinweed, Silphium laciniatum
(noun) North American perennial having a resinous odor and yellow flowers
Source: WordNet® 3.1
Etymology
Noun
rosinweed (countable and uncountable, plural rosinweeds)
(US, California) Any of various composite plants which secrete resins or have a resinous smell; for example, several species in the genus Silphium in the composite family.
Anagrams
• ironweeds
Source: Wiktionary
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.
Source: Webster’s Unabridged Dictionary 1913 Edition