Erigeron philadelphicusL.

Philadelphia fleabane

WFO wfo-0000022234 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Erigeron philadelphicus, photographed by Violet T.
fig. a Violet T., CC BY 4.0 / 2022-06-13 / obs. 205849197
Erigeron philadelphicus, photographed by Michelle Norcéide
fig. b Michelle Norcéide, CC BY 4.0 / obs. 205896934
Erigeron philadelphicus, photographed by Violet T.
fig. c Violet T., CC BY 4.0 / obs. 204205454
Erigeron philadelphicus, photographed by joergmlpts
fig. d joergmlpts, CC BY 4.0 / obs. 203963313
Erigeron philadelphicus, photographed by Erik Schiff
fig. e Erik Schiff, CC0 1.0 / obs. 204460565
Erigeron philadelphicus, photographed by Mila C.
fig. f Mila C., CC BY 4.0 / obs. 204016707
Erigeron philadelphicus, photographed by Paul Solarz
fig. g Paul Solarz, CC BY 4.0 / obs. 203357525
Erigeron philadelphicus, photographed by Randy A Nonenmacher
fig. h Randy A Nonenmacher, CC BY 4.0 / obs. 205051730

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 = 13,476 observations

Peak flowering in Apr, from 13,476 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 8 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.

  • Erigeron philadelphicus f. philadelphicus
  • Erigeron philadelphicus subsp. philadelphicus
  • Erigeron philadelphicus subsp. provancheri (Vict. & J.Rousseau) J.K.Morton
  • Erigeron philadelphicus var. philadelphicus
  • Erigeron philadelphicus var. scaturicola Fernald
  • Erigeron provancheri Vict. & J.Rousseau
  • Erigeron purpureus Aiton
  • Erigeron purpureus var. purpureus

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.