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horseweed, richweed, horse balm, stoneroot, stone-root, stone root, Collinsonia canadensis | erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States | |
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richweed, clearweed, dead nettle, Pilea pumilla | a plants of the genus Pilea having drooping green flower clusters and smooth translucent stems and leaves |