| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Crassulaceae | Crassula aquatica | Pygmyweed | Tidal marshes and shores, shores and mudflats of artificial lakes and reservoirs. | Occurring in tidal marshes and shores, south to Maryland and se. Pennsylvania, and also inland along shores and mudflats of inland reservoirs in South Carolina, Georgia, and Alabama (Kartesz 1999, FNA, England 2013). Reported for Alabama by England (2013). |  (c) Ueda, Ken-ichi - CC-BY |
| Crassulaceae | Crassula drummondii | Pond margins, other muddy shores, damp bare ground, mudflats, wet pathways, eastwards in a waste area around wool-combing mill (where perhaps merely a waif). | Kansas and Colorado south to Texas; South America. | ||
| Crassulaceae | Crassula longipes | Louisiana Pygmyweed | Aquatic or stranded on sand or mud. | Mississippi and Arkansas south to Louisiana, Texas, and Mexico; also s. South America. |  (c) Joseph, Aubert - CC-BY |
| Crassulaceae | Crassula solieri | Shores. | W. North America, C. and se. Texas; Mexico (Baja California); Chile. |  (c) Davis, James Connolly - CC-BY-SA | |
| Crassulaceae | Crassula tillaea | Mossy Stonecrop, Mossy Pygmyweed | Disturbed, gravelly or sandy sites. | Native of (mainly) Mediterranean Europe, w. Asia, and n. Africa. Found at various sites near Augusta, South Carolina in 2025. |