Annual; stems are hollow and soft green or reddish in color. Oblong, egg-shaped, opposite or whorled leaves with serrated edges. White, pink or purple flowers resemble British policeman’s helmet. Crushed foliage has a strong musty smell.
Plant Details
| Habitat Notes | Wetlands, streams, riparian areas and moist woodland. |
|---|---|
| Mature Height | 3-8’ |
