Croptilon hookerianum(Torr. & A.Gray) House

Hooker's scratchdaisy

WFO wfo-0000081670 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 4 observations

This species has been photographed under an open licence only 4 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.

Croptilon hookerianum, photographed by Eric Knight
fig. a Eric Knight, CC BY 4.0 / 2019-11-14 / obs. 56452895
Croptilon hookerianum, photographed by Sam Kieschnick
fig. b Sam Kieschnick, CC BY 4.0 / obs. 4184307
Croptilon hookerianum, photographed by Eric Knight
fig. c Eric Knight, CC BY 4.0 / obs. 56452913
Croptilon hookerianum, photographed by Eric Knight
fig. d Eric Knight, CC BY 4.0 / obs. 56452918
Croptilon hookerianum, photographed by Alison Northup
fig. e Alison Northup, CC BY 4.0 / obs. 25455550
Croptilon hookerianum, photographed by Calinsdad
fig. f Calinsdad, CC0 1.0 / obs. 21222879
Croptilon hookerianum, photographed by Alison Northup
fig. g Alison Northup, CC BY 4.0 / obs. 25455562
Croptilon hookerianum, photographed by Calinsdad
fig. h Calinsdad, CC0 1.0 / obs. 21222858

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 4 botanical countries

Regions where Croptilon hookerianum is native: Arkansas, Kansas, Oklahoma, Texas ArkansasKansasOklahomaTexas
Native distribution of Croptilon hookerianum, 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
Arkansas ARK NORTHERN AMERICA
Kansas KAN
Oklahoma OKL
Texas TEX

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 11 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.

  • Croptilon divaricatum var. graniticum (E.B.Sm.) Shinners
  • Croptilon divaricatum var. hookerianum (Torr. & A.Gray) Shinners
  • Croptilon hookerianum var. hookerianum
  • Haplopappus divaricatus var. hookerianus (Torr. & A.Gray) Waterf.
  • Haplopappus validus (Rydb.) Cory
  • Haplopappus validus subsp. graniticus E.B.Sm.
  • Haplopappus validus subsp. torreyi E.B.Sm.
  • Haplopappus validus subsp. validus
  • Isopappus divaricatus var. hookerianus (Torr. & A.Gray) Shinners
  • Isopappus hookerianus Torr. & A.Gray
  • Isopappus validus Rydb.

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. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. 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.