| Author | L. | |
| Distribution | Mountains and Piedmont; absent from most of the southern Piedmont.
NH to MN, south to northern GA, northern MS, and northern AR. | |
| Abundance | Common in the northern and central Mountains, Piedmont foothills, and in the northern Piedmont. Uncommon to fairly common in the southern Mountains, but rather scarce in the central Piedmont. Practically absent from the southern Piedmont. | |
| Habitat | Mesic to dry woodlands and forests, forest openings, forest edges, rocky slopes, especially in mafic or calcareous soils. This is more of a forest interior species than most others in the genus, though it does grow on borders of forests. | |
| Phenology | Flowering and fruiting July-October. | |
| Identification | It is easily identified by its sessile (stalkless), paired leaves that are very long (often 5-6 times as long as wide) and tapered gradually to a point. Apparently the only difference between the nominate variety and var. brittonianum is the latter's ovate to lance-ovate leaves. There are several other upland species of the Piedmont and mountains with lanceolate to ovate leaves but with a lower length to width ratio, such as E. vaseyi. | |
| Taxonomic Comments | Two varieties are found in the state, the widespread nominate one and var. brittonianum, which is limited to the southern mountains and adjacent foothills.
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| Other Common Name(s) | Upland Thoroughwort, Sessile-leaved Boneset | |
| State Rank | S4 [S5] | |
| Global Rank | G5 | |
| State Status | | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
