| horse balm | (n) erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States, Syn. stone-root, horseweed, Collinsonia canadensis, richweed, stone root, stoneroot |
| Stoneroot | n. (Bot.) A North American plant (Collinsonia Canadensis) having a very hard root; horse balm. See |