Eutrochium maculatum(L.) E.E.Lamont

spotted Joe-Pye weed

WFO wfo-0000095626 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Eutrochium maculatum, photographed by Tom Lazar
fig. a Tom Lazar, CC0 1.0 / 2021-10-09 / obs. 163437286
Eutrochium maculatum, photographed by Mary Krieger
fig. b Mary Krieger, CC BY 4.0 / obs. 159353276
Eutrochium maculatum, photographed by Jason Swanson
fig. c Jason Swanson, CC0 1.0 / obs. 165448077
Eutrochium maculatum, photographed by Steven Lamonde
fig. d Steven Lamonde, CC BY 4.0 / obs. 157310886
Eutrochium maculatum, photographed by Carter Dorscht
fig. e Carter Dorscht, CC0 1.0 / obs. 154412722
Eutrochium maculatum, photographed by zancat
fig. f zancat, CC BY 4.0 / obs. 157007888
Eutrochium maculatum, photographed by Chris
fig. g Chris, CC BY-SA 4.0 / obs. 154859796
Eutrochium maculatum, photographed by Mary Krieger
fig. h Mary Krieger, CC BY 4.0 / obs. 155997258

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.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Flowering n = 2,836 observations

Peak flowering in Aug, from 2,836 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 14 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.

  • Eupatoriadelphus maculatus var. bruneri (A.Gray) R.M.King & H.Rob.
  • Eupatorium atromontanum A.Nelson
  • Eupatorium bruneri var. foliosum House
  • Eupatorium maculatum f. maculatum
  • Eupatorium maculatum subsp. bruneri (A.Gray) G.W.Douglas
  • Eupatorium maculatum subsp. maculatum
  • Eupatorium maculatum var. bruneri (A.Gray) Breitung
  • Eupatorium maculatum var. foliosum Wiegand
  • Eupatorium purpureum var. bruneri B.L.Rob.
  • Eupatorium purpureum var. foliosum Fernald
  • Eupatorium rydbergii Britton
  • Eupatorium trifoliatum var. bruneri Farw.
  • Eupatorium trifoliatum var. foliosum Farw.
  • Eupatorium trifoliatum var. maculatum Farw.

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.