| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Polygonaceae | Acetosa | Sorrel, Sour Dock |  | ||
| Polygonaceae | Antigonon | Love-chain, Coralvine, Corallita |  | ||
| Polygonaceae | Brunnichia | Buckwheat-vine |  | ||
| Polygonaceae | Coccoloba | Pigeon-plum, Sea-grape |  | ||
| Polygonaceae | Emex | Emex, Devil’s-thorn, Cape Spinach |  | ||
| Polygonaceae | Eriogonum | Wild-buckwheat |  | ||
| Polygonaceae | Fagopyrum | Buckwheat |  | ||
| Polygonaceae | Fallopia | Climbing Buckwheat |  | ||
| Polygonaceae | Koenigia | ||||
| Polygonaceae | Muehlenbeckia |  | |||
| Polygonaceae | Parogonum |  | |||
| Polygonaceae | Persicaria | Smartweed, Tearthumb, Jumpseed |  | ||
| Polygonaceae | Polygonella | Jointweed |  | ||
| Polygonaceae | Polygonum | Knotweed |  | ||
| Polygonaceae | Reynoutria |  | |||
| Polygonaceae | Rheum | Rhubarb |  | ||
| Polygonaceae | Rumex | Dock |  | ||
| Polygonaceae | Triplaris |