Hieracium abscissumLess.

Rusby's hawkweed

WFO wfo-0000001936 Accepted WFO 2026-06 8 photographs CC BY-SA

Plate 1 figs. a–h · 3 observations

This species has been photographed under an open licence only 3 times, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.

Hieracium abscissum, photographed by Eugenio Padilla
fig. a Eugenio Padilla, CC BY-SA 4.0 / 2019-12-14 / obs. 92314241
Hieracium abscissum, photographed by Eugenio Padilla
fig. b Eugenio Padilla, CC BY-SA 4.0 / obs. 92314242
Hieracium abscissum, photographed by Eugenio Padilla
fig. c Eugenio Padilla, CC BY-SA 4.0 / obs. 92314139
Hieracium abscissum, photographed by Eugenio Padilla
fig. d Eugenio Padilla, CC BY-SA 4.0 / obs. 106232698
Hieracium abscissum, photographed by Eugenio Padilla
fig. e Eugenio Padilla, CC BY-SA 4.0 / obs. 106236185
Hieracium abscissum, photographed by Eugenio Padilla
fig. f Eugenio Padilla, CC BY-SA 4.0 / obs. 106236287
Hieracium abscissum, photographed by Eugenio Padilla
fig. g Eugenio Padilla, CC BY-SA 4.0 / obs. 106232920
Hieracium abscissum, photographed by Eugenio Padilla
fig. h Eugenio Padilla, CC BY-SA 4.0 / obs. 106236293

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.

Native range 13 botanical countries

Regions where Hieracium abscissum is native: Arizona, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, New Mexico, Costa Rica, Guatemala, Honduras, Nicaragua, Panamá ArizonaMexico CentralMexico GulfMexico NortheastMexico NorthwestMexico SoutheastMexico SouthwestNew MexicoCosta RicaGuatemalaHondurasNicaraguaPanamá
Native distribution of Hieracium abscissum, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
Arizona ARI NORTHERN AMERICA
Mexico Central MXC
Mexico Gulf MXG
Mexico Northeast MXE
Mexico Northwest MXN
Mexico Southeast MXT
Mexico Southwest MXS
New Mexico NWM
Costa Rica COS SOUTHERN AMERICA
Guatemala GUA
Honduras HON
Nicaragua NIC
Panamá PAN

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Also published as 21 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 abscissum f. hypoglossum Zahn
  • Hieracium abscissum subsp. morelosanum S.F.Blake
  • Hieracium anthurum Fr.
  • Hieracium comatum Fr.
  • Hieracium comatum var. comatum
  • Hieracium comatum var. felipense Zahn
  • Hieracium comatum var. irregulare Fr.
  • Hieracium hirsutum Sessé & Moc.
  • Hieracium intybiforme Arv.-Touv.
  • Hieracium orizabaeum Arv.-Touv.
  • Hieracium rusbyi Greene
  • Hieracium rusbyi var. rusbyi
  • Hieracium strigosum D.Don
  • Hieracium thyrsoideum Fr.
  • Hieracium thyrsoideum var. spectabile Fr.
  • Hieracium thyrsoideum var. thyrsoideum
  • Pilosella abscissa (Less.) F.W.Schultz & Sch.Bip.
  • Pilosella anthura (Fr.) F.W.Schultz & Sch.Bip.
  • Pilosella comata (Fr.) F.W.Schultz & Sch.Bip.
  • Pilosella strigosa (D.Don) F.W.Schultz & Sch.Bip.
  • Pilosella thyrsoidea (Fr.) F.W.Schultz & Sch.Bip.

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.
  3. USDA PLANTS Database. common name, checklist symbol HIRU. public domain. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.