| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Hydrocharitaceae | Najas guadalupensis var. floridana | Lakes and streams. | S. GA and s. AL south to FL. |  | |
| Hydrocharitaceae | Najas guadalupensis var. guadalupensis | Common Naiad, Southern Naiad | Lakes, rivers, impoundments. | ME to AB and WA, south to s. FL, TX, and CA, and south through Mexico, Central America, South America; West Indies. |  |
| Hydrocharitaceae | Najas guadalupensis var. olivacea | Lakes, rivers. | QC, ON, and MB south to NY, IN, IL, and IA. |  |
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