Pilosella officinarumVaill.

mouse-eared hawkweed

WFO wfo-0000068649 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 John Kenrick Gibson
fig. b John Kenrick Gibson, CC0 1.0 / obs. 205580012
Pilosella officinarum, photographed by Jon Mortin
fig. c Jon Mortin, CC BY 4.0 / obs. 205460023
Pilosella officinarum, photographed by Юрий Носков
fig. d Юрий Носков, CC0 1.0 / obs. 204397699
Pilosella officinarum, photographed by Марина Садыкова
fig. e Марина Садыкова, CC BY 4.0 / obs. 205691613
Pilosella officinarum, photographed by Zakqary Roy
fig. f Zakqary Roy, CC BY 4.0 / obs. 203572617
Pilosella officinarum, photographed by Łucja Borsuk
fig. g Łucja Borsuk, CC BY 4.0 / obs. 203796495
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 31 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 pilosella subsp. albovelutinum Nägeli & Peter
  • Hieracium pilosella subsp. amphileucum Nägeli & Peter
  • Hieracium pilosella subsp. bellidiforme Nägeli & Peter
  • Hieracium pilosella subsp. camerarii Nägeli & Peter
  • Hieracium pilosella subsp. dasyscapum (Nägeli & Peter) Zahn
  • Hieracium pilosella subsp. micradeniophorum Zahn
  • Hieracium pilosella subsp. nigripilum Nägeli & Peter
  • Hieracium pilosella subsp. parvipilosella Nägeli & Peter
  • Hieracium pilosella subsp. pilifolium Nägeli & Peter
  • Hieracium pilosella subsp. poliophyton Zahn
  • Hieracium pilosella subsp. pulverulentum Nägeli & Peter
  • Hieracium pilosella subsp. rarovelutum Nägeli & Peter
  • Hieracium pilosella subsp. subnivescens Zahn
  • Hieracium pilosella subsp. velutifolium Nägeli & Peter
  • Hieracium pilosella subsp. velutinoides Zahn
  • Hieracium pilosella subsp. velutinum (Hegetschw.) Fr.
  • Hieracium pilosella unranked incanum (DC.) Zahn
  • Hieracium pilosella var. dasyscapum Nägeli & Peter
  • Hieracium pilosella var. incanum DC.
  • Hieracium pilosella var. niveum Müll.Arg.
  • Hieracium pilosella var. pilosella
  • Hieracium pilosella var. pilosissimum Döll
  • Hieracium poliophyton Üksip
  • Hieracium trichosoma Brenner

and 7 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.