| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Plantaginaceae | Bacopa aquatica | Aquatic in pools and exposed on mud. | Native of South America. |  | |
| Plantaginaceae | Bacopa caroliniana | Blue Water-hyssop, Sweet Water-hyssop, Carolina Water-hyssop, Lemon Bacopa | Wet shores, tidal muds, marshes, disturbed wetland sites. | Se. VA south to s. FL, west to e. TX; disjunct in KY. |  |
| Plantaginaceae | Bacopa egensis | Brazilian Water-hyssop | Lakes, ponds, ditches, other disturbed aquatic areas. | Native of South America. |  |
| Plantaginaceae | Bacopa innominata | Tropical Water-hyssop | Freshwater and tidal muds, marshes, shallow water. | MD south to s. FL, and in the West Indies and Central America. |  |
| Plantaginaceae | Bacopa monnieri | Brahmi, Indian-pennywort, Herb-of-grace, Monnier's Water-hyssop | Freshwater tidal marshes, muddy shores, streams and pools. | E. MD and e. VA south to s. FL, west to c. TX, and in the West Indies and the New World subtropics and tropics; also Old World tropics and subtropics. Reported for s. IN by Bill Thomas (pers.comm., 2022). |  |
| Plantaginaceae | Bacopa repens | South American Water-hyssop | Freshwater pools. | Presumably native of the New World tropics. Attributed to se. VA by Pennell (1935); no documentation is known. |  |
| Plantaginaceae | Bacopa rotundifolia | Midwestern Water-hyssop | Tidal muds, shallow water of large natural lake, river sandbars, other shallow water and shore situations. | IN and IA west to ND and MT, south to AL and AZ; disjunct in e. MD, e. VA, ne. NC, and e. SC (Bradley et al. [in prep.]), where apparently native, though Cronquist (1991) considered introduced. Known in NC only from Lake Mattamuskeet, Hyde County, and "north of Wilmingon); not recently seen. |  |
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