| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|
| Lythraceae | Lythrum alatum | Northern Winged Loosestrife | Calcareous meadows, marl fens, and disturbed wet calcareous places. | ME, NY, MI, and ND south to sc. VA, e. TN, nw. GA, n. AL, n. AR, ne. OK, and CO; allegedly disjunct in Citrus County (Graham 1975; Wunderlin, Hansen, & Franck 2017). | 
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| Lythraceae | Lythrum californicum | California Loosestrife | Low, moist areas. | KS west to CA, south to TX, NM, AZ, and c. Mexico. | |
| Lythraceae | Lythrum curtissii | Curtiss's Loosestrife | Calcareous swamps, seepage areas. | Sw. GA south to Panhandle FL, and disjunct in ne. FL (St. Johns County [Slaughter 2014]); the report from Emanuel County, GA (Jones & Coile 1988) is in error. | 
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| Lythraceae | Lythrum flagellare | Florida Loosestrife | Wet Florida prairies, floodplain marshes, moist roadsides. | C. and peninsular FL. | 
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| Lythraceae | Lythrum hyssopifolia | Annual Loosestrife | Salt marshes, other wet soils; probably only adventive from Eurasia, but sometimes interpreted as native from ME to NJ. | Probably native only in Eurasia; present in North America in the northeast and on the west coast. | 
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| Lythraceae | Lythrum lanceolatum | Southern Winged Loosestrife | Pine savannas, pine flatwoods, blackland prairies, coastal prairies, marshes, swamps, other moist to wet places, ditches. | Se. VA, se. NC, SC, GA, AL, MS, n. AR, s. MO, and OK south to s. FL, s. TX, Mexico; West Indies. | 
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| Lythraceae | Lythrum lineare | Narrowleaf Loosestrife, Wand Loosestrife, Saltmarsh Loosestrife | Nearly fresh, brackish, and saline marshes. | NJ south to s. FL and west to TX. | 
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| Lythraceae | Lythrum salicaria | Purple Loosestrife | Swamps, marshes, other wet places. | Native of Eurasia. An extremely noxious weed in the ne. United States, aggressively colonizing and coming to dominate a wide variety of freshwater wetlands, sometimes to the near exclusion of native vegetation. | 
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| Lythraceae | Lythrum thymifolium | Thymelaef Loosestrife | On ballast. | Native of Mediterranean Europe. | |
| Lythraceae | Lythrum virgatum | European Wand Loosestrife | Marshes and ditches. | Native of Europe. | 
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