| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Malvaceae | Kosteletzkya depressa | White Fen-rose | Tidal marshes, coastal berms. | S. FL; West Indies; s. TX south through Mexico and Central America to South America. | |
| Malvaceae | Kosteletzkya pentacarpos | Seashore-mallow, Saltmarsh-mallow, Fen-rose | Brackish to freshwater tidal marshes. | NY (Long Island) south to s. FL, west to TX; West Indies (Cuba); also early introduced in Europe, Linnaeus's name based on its occurrence in Venice). |  |
| Malvaceae | Kosteletzkya smilacifolia | Florida Seashore-mallow | Freshwater marshes. | Endemic in peninsular FL. |
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