Eupatorium trifoliatum Linnaeus, Species Plantarum 2: 837. 1753.

"Habitat in Virginia." RCN: 6062.

Lectotype (Reveal in Jarvis & Turland in Taxon 47: 361. 1998): Herb. Linn. No. 336.1 (S) .

Current name: Eupatorium purpureum L. ( Asteraceae).

Note: Wiegand (in Rhodora 22: 61. 1920) provided an extensive discussion of the original elements for this name. Mackenzie (in Rhodora 22: 163-165. 1920; 29: 6. 1927) disputed that Clayton 620 (BM) played any role in this but neither author designated a type. See review by Reveal & al. (in Huntia 7: 221. 1987). Lamond (in Mem. New York Bot. Gard. 72: 48. 1995) incorrectly treated 978.11 (LINN), a post-1753 addition to the herbarium, as the holotype.