| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
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| Fabaceae | Neptunia lutea | Yellow Neptunia | Longleaf pine savannas, prairies, roadsides. | AL west to OK and TX. | 
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| Fabaceae | Neptunia microcarpa | Little-fruit Neptunia | Scrub. | S. TX south into adjacent Mexico. | |
| Fabaceae | Neptunia oleracea | Garden-puff, Water Mimosa | Floating aquatic in ponds, slow-moving waters. | Native of the Neotropics. | |
| Fabaceae | Neptunia plena | Water-dead-and-awake | In shallow water; possibly merely adventive in our area. | S. TX south through Mexico and Central America to South America; West Indies. | |
| Fabaceae | Neptunia pubescens | Tropical Neptunia | Pine savannas, longleaf pine sandhills, Florida scrub, prairies, coastal prairies, roadsides. | S. GA, AL, and FL west to s. TX, and south to Argentina. | 
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