| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Haloragaceae | Myriophyllum aquaticum | Parrot-feather | Ditches, slow-moving rivers, pools, ponds. | Native of South America. An introduced species now widespread in se. United States, north to New York, West Virginia, and Missouri. |  (c) Fleming, Gary P. |
| Haloragaceae | Myriophyllum farwellii | Farwell's Water-milfoil | Submersed in ponds, lakes, and slow streams. | Nova Scotia and Québec and Manitoba south to New York (Long Island), ne. Pennsylvania, s. Wisconsin, and c. Minnesota. |  (c) Wiegersma, Quinten - CC-BY |
| Haloragaceae | Myriophyllum heterophyllum | Southern Water-milfoil | Ditches, slow-moving waters of rivers and streams, pools, ponds, springs. | New York west to Ontario and Minnesota, south to Florida, Texas, and Mexico. |  (c) Sorrie, Bruce A. - CC-BY |
| Haloragaceae | Myriophyllum humile | Low Water-milfoil | Millponds, other artificial ponds, slow-moving water of streams. | Nova Scotia west to Minnesota, south to Delaware, Maryland, Virginia, and Illinois. |  (c) margaretcurtin - CC-BY-NC, permission granted to NCBG |
| Haloragaceae | Myriophyllum laxum | Loose Water-milfoil | Limesink depression ponds (dolines), spring-runs, rarely also in lakes. | Se. Virginia south to n. Florida, s. Alabama, s. Mississippi (Sorrie & Leonard 1999), and e. Louisiana (Reid et al. 2021); reported for w. Cuba (Acevedo-Rodríguez and Strong 2012). Documented for Virginia by a 1922 specimen from Princess Anne County at GH (Sorrie, pers. comm.). |  (c) Cressler, Alan M. |
| Haloragaceae | Myriophyllum pinnatum | Alternate-leaved Water-milfoil, Cutleaf Water-milfoil, Green Parrot's-feather | Pools, ditches, ponds. | New Brunswick, Vermont, and Massachusetts west to Iowa and South Dakota, south to Georgia and Texas; Mexico; Cuba. |  (c) Horn, Jay |
| Haloragaceae | Myriophyllum sibiricum | Common Water-milfoil | Quiet circumneutral to alkaline waters. | Newfoundland and Labrador (Labrador) west to Alaska, south to Maryland, Illinois, Missouri, New Mexico, and California; also in n. Eurasia. |  (c) Marcum, Paul |
| Haloragaceae | Myriophyllum spicatum | Eurasian Water-milfoil | Ponds and impoundments. | Native of Eurasia. Easily confused with M. sibiricum, M. spicatum is an introduced species, now widespread in e. United States. Reported for South Carolina by Hill & Horn (1997). |  (c) Fleming, Gary P. |
| Haloragaceae | Myriophyllum tenellum | Leafless Water-milfoil | Natural lakes (Carolina bay lakes), typically growing on the sandy bottoms in water 1-2 meters deep. | Newfoundland and Labrador (Newfoundland) west to Minnesota, south to Pennsylvania and New Jersey, and disjunct south to a few occurrences in North Carolina; the report from Virginia Beach, Virginia is false. |  (c) Semmling, Bonnie - CC-BY |
| Haloragaceae | Myriophyllum verticillatum | Whorled Water-milfoil | Quiet waters. | A circumboreal species, south in North America to Delaware, Maryland, n. West Virginia, Indiana, Nebraska, Texas, and California. |  (c) Садыкова, Марина - CC-BY |