| Author | de Candolle | |
| Distribution | Most of the Coastal Plain and Sandhills; rare in the lower Piedmont.
Coastal Plain, southeastern VA to northern FL and eastern TX, north in the Mississippi Embayment to southeastern MO and western TN. Disjunct to central TN. | |
| Abundance | Fairly common to common in most of the Coastal Plain and Sandhills, but very rare in the northeastern portions (such as in counties bordering Pamlico and Albemarle sounds). Barely extends into the southeastern Piedmont, where very rare. | |
| Habitat | Wet to periodically inundated soils of margins of blackwater streams and rivers, river marshes, beaver marshes, impoundment shores, swamp openings, wet savannas, clay-based bays. | |
| Phenology | Flowering and fruiting late July-October. | |
| Identification | This thoroughwort grows 2-4 feet tall and has an overall olive-green cast. Leaves most often are in whorls of 3, but may be opposite; they are broadly lance-shape and tapered to a short stalk. This is normally the only Eupatorium with leaves in whorls of 3, particularly those growing in Coastal Plain wetlands. | |
| Taxonomic Comments | None
| |
| Other Common Name(s) | Small-flower Eupatorium | |
| State Rank | S4 | |
| Global Rank | G5 | |
| State Status | | |
| US Status | | |
| USACE-agcp | FACW link |
| USACE-emp | FACW link |
