| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Hydrocharitaceae | Hydrilla verticillata ssp. peregrina | Wandering Hydrilla | Ponds, lakes, rivers, often locally abundant. This species has become a serious aquatic weed. | Native of Korea and adjacent ne. China. |  |
| Hydrocharitaceae | Hydrilla verticillata ssp. verticillata | Whorled Hydrilla | Ponds, lakes, rivers, often locally abundant. This species has become a serious aquatic weed. | Native of China and adjacent areas. |  |