| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Primulaceae | Samolus ebracteatus var. alyssoides | Texas Coastal Water-pimpernel | Coastal sandy dunes, beaches, salt marshes, coastal prairies, ditches. | Sw. LA, coastal TX, e. coast of Mexico. |  |
| Primulaceae | Samolus ebracteatus var. cuneatus | Inland Water-pimpernel | Seeps, springs, streams, pond margins. | Sc. KS, c. and w. OK, NM south to extreme s. TX, n. Mexico (TAM, COA, CHH, SLP); disjunct in s. NV. | |
| Primulaceae | Samolus ebracteatus var. ebracteatus | West Indian Water-pimpernel, Limewater Brookweed | Brackish and salt marshes, brackish swamps, and wet pine flatwoods over calcareous substrates. | Peninsular FL, coastal Panhandle FL; West Indies. |  |
| Primulaceae | Samolus parviflorus | Water-pimpernel, Brookweed | Stream banks, tidal freshwater and oligohaline marshes, pools in floodplains, calcareous seepage swamps, interdune ponds. | NB west to BC, south to Central America; c. and s. South America; Bahamas. |  |
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