1. [ noun ] (botany) any of various resinous glandular plants of the genus Madia; of western North and South America
Related terms: herb melosa Madia
2. [ noun ] (botany) any of various western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally; often poisonous to livestock
Synonyms: gum_plant rosinweed gumweed
Related terms: herb Grindelia_robusta curlycup_gumweed Grindelia
Similar spelling:   tarwood