Pilosella officinarumF.W.Schultz & Sch.Bip.

mouse-eared hawkweed

WFO wfo-0000115134 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Pilosella officinarum, photographed by Вячеслав Юсупов
fig. a Вячеслав Юсупов, CC BY 4.0 / 2022-06-12 / obs. 205586113
Pilosella officinarum, photographed by Jon Mortin
fig. b Jon Mortin, CC BY 4.0 / obs. 205460023
Pilosella officinarum, photographed by Марина Садыкова
fig. c Марина Садыкова, CC BY 4.0 / obs. 205691613
Pilosella officinarum, photographed by John Kenrick Gibson
fig. d John Kenrick Gibson, CC0 1.0 / obs. 205580012
Pilosella officinarum, photographed by Zakqary Roy
fig. e Zakqary Roy, CC BY 4.0 / obs. 203572617
Pilosella officinarum, photographed by Łucja Borsuk
fig. f Łucja Borsuk, CC BY 4.0 / obs. 203796495
Pilosella officinarum, photographed by Юрий Носков
fig. g Юрий Носков, CC0 1.0 / obs. 204397699
Pilosella officinarum, photographed by Jais Knudsen
fig. h Jais Knudsen, CC BY 4.0 / obs. 203585114

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 = 2,130 observations

Peak flowering in May, from 2,130 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 165 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.

  • Hieracium albofloccosum (Nägeli & Peter) Prain
  • Hieracium kemulariae Üksip
  • Hieracium melanops (Peter) J.Weiss
  • Hieracium paradoxum Kem.-Nath.
  • Hieracium pilosella L.
  • Hieracium pilosella subsp. aclados Nägeli & Peter
  • Hieracium pilosella subsp. acuminatissimum Zahn
  • Hieracium pilosella subsp. albofloccosum Nägeli & Peter
  • Hieracium pilosella subsp. albomicans Zahn
  • Hieracium pilosella subsp. albovelutinum Nägeli & Peter
  • Hieracium pilosella subsp. albulae Nägeli & Peter
  • Hieracium pilosella subsp. amauron Nägeli & Peter
  • Hieracium pilosella subsp. amphileucum Nägeli & Peter
  • Hieracium pilosella subsp. angustellum (Norrl.) Hamb.
  • Hieracium pilosella subsp. angustissimum Nägeli & Peter
  • Hieracium pilosella subsp. angustius Nägeli & Peter
  • Hieracium pilosella subsp. argenticapillum Nägeli & Peter
  • Hieracium pilosella subsp. argentisetum Zahn
  • Hieracium pilosella subsp. athesinum Dalla Torre & Sarnth.
  • Hieracium pilosella subsp. atripileolum Zahn
  • Hieracium pilosella subsp. australe Nägeli & Peter
  • Hieracium pilosella subsp. averianum Nägeli & Peter
  • Hieracium pilosella subsp. barbisquamum Nägeli & Peter
  • Hieracium pilosella subsp. bellidiforme Nägeli & Peter

and 141 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.