Link: http://www.dsd.state.md.us/comar/comarhtml/08/08.02.19.04.htm
| Subject Name | Scientific Name | Family | Order |
|---|---|---|---|
| giant salvinia | Salvinia molesta D. S. Mitchell | Salviniaceae | Hydropteridales |
| Brazilian waterweed, Brazilian elodea | Egeria densa Planch. | Hydrocharitaceae | Hydrocharitales |
| hydrilla | Hydrilla verticillata (L. f.) Royle | Hydrocharitaceae | Hydrocharitales |
| parrotfeather | Myriophyllum aquaticum (Vell.) Verdc. | Haloragaceae | Haloragales |
| European water chestnut | Trapa natans L. | Trapaceae | Myrtales |
| Mediterranean clone of caulerpa | Caulerpa taxifolia (Vahl) C. Agardth | Caulerpaceae | Caulerpales |