Eupatorium sessilifolium Linnaeus var. brittonianum Porter. Phen: Aug; Sep. Hab: Circumneutral soils of woodlands at moderate elevations. Dist: NH and MN, south to NJ, PA, MD, w. NC, KY, and MO.
Origin/Endemic status: Endemic
Other Comments: The only collection from NC known to me is from Cedar Cliff, Buncombe County, in 1897. I disagree with Cronquist's equation of this taxon with E. godfreyanum.
Synonymy: = F, Il, K1, WV; < Eupatorium sessilifolium L. – C, FNA21, G, K3, K4, Mi, NE, NY, Pa, S, SE1, W, Cronquist (1985), Montgomery & Fairbrothers (1970), Schilling (2011a), Siripun & Schilling (2006); < Eupatorium sessilifolium L. var. sessilifolium – RAB