| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Marsileaceae | Marsilea | Waterclover | ![]() (c) Bradley, Keith | ||
| Marsileaceae | Marsilea ancylopoda | ||||
| Marsileaceae | Marsilea hirsuta | Bristly Waterclover | Wet disturbed areas. | Native of Australia. | |
| Marsileaceae | Marsilea macropoda | Golden Waterclover, Big-footed Waterclover | Shallow water, wet ditches. | C. and e. Texas south to Mexico; reported as introduced eastward in Alabama and c. and s. peninsular Florida. | ![]() © Adam Black |
| Marsileaceae | Marsilea minuta | Small Waterclover | Lakes and streams. | Native of the Paleotropics. Known in North America from Alabama, Florida, Georgia, Tennessee, and South Carolina. | ![]() (c) Bradley, Keith |
| Marsileaceae | Marsilea mutica | Nardoo, Australian Waterclover | Ditches, ponds. | Native of Australia. Apparently spreading rapidly in Virginia. Naturalized populations have also been reported for s. Illinois, c. Georgia and Alabama and e. Texas; it has perhaps been undercollected. | ![]() (c) Cressler, Alan M. |
| Marsileaceae | Marsilea oligospora | Pacific Waterclover | Wet, disturbed areas. | Native of w. North America. | |
| Marsileaceae | Marsilea quadrifolia | European Waterclover | Shallow water of artificial impoundments. | Native of Europe and Asia. Sold in garden stores as an aquatic to be grown in water gardens, and likely to be encountered more widely in the future. | ![]() (c) Das, Sandipan - CC-BY |
| Marsileaceae | Marsilea vestita | Hairy Waterclover | Ponds, wet depressions, streamsides, wet ditches, old fields. | Minnesota and British Columbia south to Mississippi, Louisiana, Texas, New Mexico, Arizona, California, and c. Mexico. | ![]() (c) Cressler, Alan M. |
| Marsileaceae | Marsileaceae | Water-clover Family | ![]() (c) Cressler, Alan M. | ||
| Marsileaceae | Pilularia | Pillwort | ![]() (c) Bradley, Keith | ||
| Marsileaceae | Pilularia americana | American Pillwort | Vernal pools and seepage areas on granitic flatrocks, other ponds, drawdown shores of lakes. | This peculiar plant has a puzzling distribution, being known from several disjunct regions: Washington to s. California; Nebraska and Missouri south to e. and c. Texas; South Carolina, Georgia, Tennessee, Alabama, and Mexico (Durango and Baja California Norte); similar plants, perhaps conspecific, occur in South America and Africa. The apparently fragmented distribution may be partly explainable by the inconspicuous nature of the plant. First reported for South Carolina in 1993 (J. Allison, pers. comm.). | ![]() (c) Cressler, Alan M. |







