Carolina water horehound (Lycopus cokeri)
Same genus
- American water horehound (Lycopus americanus)
- Clasping water horehound (Lycopus amplectens)
- Rough bugleweed (Lycopus asper)
- St. Lawrence waterhorehound (Lycopus laurentianus)
- Taperleaf water horehound (Lycopus rubellus)
- Northern bugleweed (Lycopus uniflorus)
- Virginia Water Horehound (Lycopus virginicus)
- Gipsywort (Lycopus europaeus)