collinsonia : Idioms & Phrases
collinsonia canadensis
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noun erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States
horseweed; stone root; horse balm; richweed; stone-root; stoneroot.
WordNet
genus collinsonia
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noun small genus of perennial erect or spreading aromatic herbs; United States
Collinsonia.