Pilosella aurantiaca (orange hawkweed)

Plate 1 figs. a–h

Pilosella aurantiaca, photographed by Lynn Harper — fig. a Lynn Harper, CC0 1.0 / 2022-06-13 / obs. 205877438

Pilosella aurantiaca, photographed by Attila Oláh — fig. b Attila Oláh, CC BY 4.0 / obs. 205441070

Pilosella aurantiaca, photographed by Jill DeVito, PhD — fig. c Jill DeVito, PhD, CC0 1.0 / obs. 205576560

Pilosella aurantiaca, photographed by SCNeill — fig. d SCNeill, CC0 1.0 / obs. 205247446

Pilosella aurantiaca, photographed by Pavel Kacl — fig. e Pavel Kacl, CC BY 4.0 / obs. 205531619

Pilosella aurantiaca, photographed by Ian Manning — fig. f Ian Manning, CC BY 4.0 / obs. 205635091

Pilosella aurantiaca, photographed by Tom Erler — fig. h Tom Erler, CC0 1.0 / obs. 204490717

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 = 5,309 observations

246

2626

1076

601

460

155

Flowering observations of Pilosella aurantiaca by month
Month	Observations
Jan	50
Feb	23
Mar	7
Apr	7
May	246
Jun	2626
Jul	1076
Aug	601
Sep	460
Oct	155
Nov	25
Dec	33

Peak flowering in Jun, from 5,309 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 87 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 aurantiacum L.
Hieracium aurantiacum f. aurantiacum
Hieracium aurantiacum f. croceum Lindblom
Hieracium aurantiacum subsp. achnolepium Nägeli & Peter
Hieracium aurantiacum subsp. aurantiacum
Hieracium aurantiacum subsp. auropurpureum Peter
Hieracium aurantiacum subsp. calolepideum (Norrl.) Zahn
Hieracium aurantiacum subsp. carpathicola Nägeli & Peter
Hieracium aurantiacum subsp. chrysophorum Zahn
Hieracium aurantiacum subsp. claropurpureum Nägeli & Peter
Hieracium aurantiacum subsp. concoloriforme (Norrl.) Zahn
Hieracium aurantiacum subsp. decolorans (Fr.) Nägeli & Peter
Hieracium aurantiacum subsp. excelsius (Norrl.) Zahn
Hieracium aurantiacum subsp. flammans Nägeli & Peter
Hieracium aurantiacum subsp. flavicolor Zahn
Hieracium aurantiacum subsp. hinterhuberi (R.Hinterh.) Zahn
Hieracium aurantiacum subsp. imponens (Norrl.) Zahn
Hieracium aurantiacum subsp. isocomum Nägeli & Peter
Hieracium aurantiacum subsp. kajanense (Malmgren) Zahn
Hieracium aurantiacum subsp. latvaense (Norrl.) Zahn
Hieracium aurantiacum subsp. neriedowae Woł. & Zahn
Hieracium aurantiacum subsp. obsistens (Norrl.) Zahn
Hieracium aurantiacum subsp. porphyranthes Nägeli & Peter
Hieracium aurantiacum subsp. pseudaurantiacum Nägeli & Peter

and 63 more.

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
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.