Eupatorium perfoliatumL.

common boneset

WFO wfo-0000027022 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Eupatorium perfoliatum, photographed by Lynn Harper
fig. a Lynn Harper, CC0 1.0 / 2022-06-04 / obs. 203467249
Eupatorium perfoliatum, photographed by Lynn Harper
fig. b Lynn Harper, CC0 1.0 / obs. 199824922
Eupatorium perfoliatum, photographed by Lucian Vazquez
fig. c Lucian Vazquez, CC BY 4.0 / obs. 167020282
Eupatorium perfoliatum, photographed by Lynn Harper
fig. d Lynn Harper, CC0 1.0 / obs. 162934615
Eupatorium perfoliatum, photographed by Tom Scavo
fig. e Tom Scavo, CC BY 4.0 / obs. 204118156
Eupatorium perfoliatum, photographed by Lynn Harper
fig. f Lynn Harper, CC0 1.0 / obs. 165180004
Eupatorium perfoliatum, photographed by Lynn Harper
fig. g Lynn Harper, CC0 1.0 / obs. 161950660
Eupatorium perfoliatum, photographed by Steven Lamonde
fig. h Steven Lamonde, CC BY 4.0 / obs. 160820277

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Flowering n = 3,155 observations

Peak flowering in Aug, from 3,155 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 19 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Cunigunda perfoliata (L.) Lunell
  • Eupatorium chapmanii Small
  • Eupatorium connatum Michaux
  • Eupatorium connatum Michx.
  • Eupatorium cuneatum Engelm. ex Torr. & A.Gray
  • Eupatorium perfoliatum f. laciniatum Stebbins
  • Eupatorium perfoliatum f. perfoliatum
  • Eupatorium perfoliatum f. purpureum Britton
  • Eupatorium perfoliatum f. trifolium Fassett
  • Eupatorium perfoliatum f. truncatum Fassett
  • Eupatorium perfoliatum var. colpophilum Fernald & Griscom
  • Eupatorium perfoliatum var. cuneatum (Engelm.) A.Gray
  • Eupatorium perfoliatum var. perfoliatum
  • Eupatorium perfoliatum var. truncatum (Muhl. ex Willd.) A.Gray
  • Eupatorium salviifolium Sims
  • Eupatorium truncatum Muhl. ex Willd.
  • Uncasia cuneata (Engelm.) Greene
  • Uncasia perfoliata (L.) Greene
  • Uncasia truncata Greene

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.