| Author | (Willdenow ex Poiret) E.E. Lamont | |
| Distribution | Coastal Plain, Sandhills, and lower Piedmont; apparently sparse in the northern portion of the Piedmont. Records from Mountain counties are misidentified.
Coastal Plain and adjacent Piedmont, N.S. to southern SC. | |
| Abundance | Generally common in the Sandhills and southern Coastal Plain. Fairly common in the central Coastal Plain, but uncommon in the northern portions and in the eastern Piedmont. | |
| Habitat | Wet freshwater marshes, fresh-tidal marshes, maple-gum-cypress swamps, blackwater river floodplains and backup channels, beaver ponds and marshes, wet ditches. |
| Phenology | Flowering and fruiting late July-October. | |
| Identification | Coastal Plain Joe-Pye-Weed usually grows 1.5-3 feet tall, occasionally to 4 feet. Leaves are in whorls of 3-4, ovate and sharply toothed. Leaves show 3 main veins that all begin at the summit of the leafstalk, unlike our other species. The heads have only 6-9 florets (vs. 4-7 in our other species except E. maculatum, which has 9-22). Heads all lack ray florets and are pinkish-red-purple. Leaves are thick-textured (and quite rugose/wrinkled), except for those in the shade, which are markedly thinner-textured. | |
| Taxonomic Comments | Formerly treated as Eupatorium dubium.
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| Other Common Name(s) | Three-nerved Joe-pye-weed, Coastal Joe-pye-weed | |
| State Rank | S4S5 [S5] | |
| Global Rank | G5 | |
| State Status | | |
| US Status | | |
| USACE-agcp | FACW link |
| USACE-emp | FACW link |
