Eupatorium perfoliatum Linnaeus, Species Plantarum 2: 838. 1753.

"Habitat in Virginiae aquosis." RCN: 6066.

Lectotype (Reveal & al. in Huntia 7: 222. 1987): Kalm, Herb. Linn. No. 978.17 (LINN; iso- 336.9 S) .

Current name: Eupatorium perfoliatum L. ( Asteraceae).