Erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States.

synonyms: Collinsonia canadensis, horse balm, horseweed, stone-root, stone root, stoneroot.

A plants of the genus Pilea having drooping green flower clusters and smooth translucent stems and leaves.

synonyms: clearweed, dead nettle, Pilea pumilla.