Achillea millefoliumL.

common yarrow

WFO wfo-0000042097 Accepted WFO 2026-06 8 photographs CC0 / CC BY In the accuracy benchmark

Plate 1 figs. a–h

Achillea millefolium, photographed by Lynn Harper
fig. a Lynn Harper, CC0 1.0 / 2022-06-13 / obs. 205873606
Achillea millefolium, photographed by Michelle Norcéide
fig. b Michelle Norcéide, CC BY 4.0 / obs. 205899506
Achillea millefolium, photographed by Jack Forrester
fig. c Jack Forrester, CC BY 4.0 / obs. 205847159
Achillea millefolium, photographed by Eric Bartkowski
fig. d Eric Bartkowski, CC0 1.0 / obs. 205793054
Achillea millefolium, photographed by mattnewnham
fig. e mattnewnham, CC0 1.0 / obs. 205453373
Achillea millefolium, photographed by Violet T.
fig. f Violet T., CC BY 4.0 / obs. 205848751
Achillea millefolium, photographed by Anastasia_Surkova
fig. g Anastasia_Surkova, CC BY 4.0 / obs. 205899211
Achillea millefolium, photographed by Antony Coombs
fig. h Antony Coombs, CC BY 4.0 / obs. 205419788

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 = 22,608 observations

Peak flowering in Jul, from 22,608 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 120 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.

  • Achillea albida Willd.
  • Achillea alpicola (Rydb.) Rydb.
  • Achillea ambigua Boiss.
  • Achillea anethifolia Fisch. ex Herder
  • Achillea arenicola A.Heller
  • Achillea bicolor Wender.
  • Achillea borealis Bong.
  • Achillea borealis f. borealis
  • Achillea borealis subsp. arenicola (A.Heller) D.D.Keck
  • Achillea borealis subsp. borealis
  • Achillea borealis subsp. californica (Pollard) D.D.Keck
  • Achillea borealis subsp. typica D.D.Keck
  • Achillea borealis var. arenicola (A.Heller) J.T.Howell
  • Achillea borealis var. borealis
  • Achillea borealis var. californica (Pollard) J.T.Howell
  • Achillea californica Pollard
  • Achillea coronopifolia Willd.
  • Achillea crassifolia Dietr. ex Colla
  • Achillea cristata hort. ex DC.
  • Achillea cuspidata Wall.
  • Achillea dentifera Rchb.
  • Achillea dentifera DC.
  • Achillea gigantea Pollard
  • Achillea haenkeana Tausch

and 96 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.