| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Asteraceae | Iva angustifolia | Narrowleaf Marsh-elder | Wet disturbed areas. | Se. KS, AR, and e. OK south to LA and TX, eastward to Livingston Parish, LA. | |
| Asteraceae | Iva annua | Sumpweed, Rough Marsh-elder | Fields, especially bottomlands, disturbed places; in the eastern and inland part of area probably introduced (by native Americans) from farther west. | PA, ND, and CO south to FL, NM, and Mexico (the original distribution uncertain). Reported for MD (Longbottom, Naczi, & Knapp 2016). |  |
| Asteraceae | Iva asperifolia | Narrowleaf Marsh-elder | Wet disturbed areas. | Native of Mexico (PUE, TAM, VER). | |
| Asteraceae | Iva axillaris | Deer-root, Poverty-weed | Waste areas around wool-combing mill, perhaps only a waif (Nesom 2004d). | Native of w. United States. |  |
| Asteraceae | Iva frutescens var. frutescens | Southern Maritime Marsh-elder | Brackish marshes and marsh edges, normally on the back side of barrier islands. | NJ south to s. FL, west to e. and se. TX. |  |
| Asteraceae | Iva frutescens var. oraria | Northern Maritime Marsh-elder | Brackish marshes and marsh edges, normally on the back side of barrier islands. | NS south to Dare County, NC; as a waif near Galveston, TX |  |
| Asteraceae | Iva imbricata | Dune Marsh-elder | Dunes, upper beach, island-end flats. | Se. VA south to s. FL, west to LA and coastal TX; Bahamas; Cuba. |  |
| Asteraceae | Iva microcephala | Small-headed Marsh-elder | Wet pine flatwoods, flatwood ponds, clay-based Carolina bays, Florida wet prairies, marshes. | Sc. NC south to s. FL, west to se. AL. |  |
| Asteraceae | Iva texensis | Texas Marsh-elder | Coastal marshes and flats. | E. TX south to ne. Mexico (TAM). |
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