Epilobium hirsutumL.

Great Willowherb

WFO wfo-0000669196 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Epilobium hirsutum, photographed by Jon Mortin
fig. a Jon Mortin, CC BY 4.0 / 2022-06-12 / obs. 205459869
Epilobium hirsutum, photographed by Shaun Swanepoel
fig. b Shaun Swanepoel, CC BY 4.0 / obs. 203567031
Epilobium hirsutum, photographed by Jon Mortin
fig. c Jon Mortin, CC BY 4.0 / obs. 194444191
Epilobium hirsutum, photographed by Egor Filippov
fig. d Egor Filippov, CC0 1.0 / obs. 193835757
Epilobium hirsutum, photographed by Dmitriy Bochkov
fig. e Dmitriy Bochkov, CC BY 4.0 / obs. 198800079
Epilobium hirsutum, photographed by Susan Marley
fig. f Susan Marley, CC BY 4.0 / obs. 192452677
Epilobium hirsutum, photographed by Николай Соболев
fig. g Николай Соболев, CC BY 4.0 / obs. 195956900
Epilobium hirsutum, photographed by Steven Cross
fig. h Steven Cross, CC0 1.0 / obs. 191615489

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 = 3,326 observations

Peak flowering in Jul, from 3,326 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 38 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.

  • Chamaenerion grandiflorum Moench
  • Chamaenerion hirsutum (L.) Scop.
  • Epilobium amplexicaule Lam.
  • Epilobium aquaticum Thuill.
  • Epilobium dubium Borbás
  • Epilobium foliosum Hochst.
  • Epilobium grandiflorum Weber
  • Epilobium grandiflorum All.
  • Epilobium himalense Royle
  • Epilobium hirsutum f. alboroseum D.C.McClint.
  • Epilobium hirsutum f. minor Gančev
  • Epilobium hirsutum f. minus Gančev
  • Epilobium hirsutum f. valdepilosum Saut.
  • Epilobium hirsutum subsp. foliosum Merino
  • Epilobium hirsutum subsp. grandiflorum Ehrh.
  • Epilobium hirsutum subsp. parviflorum Ehrh.
  • Epilobium hirsutum var. africanum H.Lév.
  • Epilobium hirsutum var. foliis-variegatis André
  • Epilobium hirsutum var. glabriusculum Mert. & W.D.J.Koch
  • Epilobium hirsutum var. laetum Wall. ex C.B.Clarke
  • Epilobium hirsutum var. minus Merino
  • Epilobium hirsutum var. sericeum Benth. ex C.B.Clarke
  • Epilobium hirsutum var. subglabrum W.D.J.Koch
  • Epilobium hirsutum var. tomentosum (Vent.) Boiss.

and 14 more.

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.