| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Poaceae | Hymenachne amplexicaulis | Trompetilla | Disturbed wet ground, strand swamps, cypress domes, marshes, lakes. | Native from Mexico south to South America. Its additional discovery in w. LA (Urbatsch & Saichuk 2014) suggests this plant may be present in additional locations along the Gulf Coast. |  |
| Poaceae | Hymenachne hemitoma | Maidencane | Lake, pond, and river shores, swamp borders, marshes, ditches, often in shallow water, often forming dense colonies in the low margin and shallow waters of Coastal Plain ponds. Occasionally in surprisingly xeric habitats, spreading vegetatively. | Coastal Plain from s. NJ south to s. FL, west to TX; also TN; South America. |  |