Arnica rydbergiiGreene

Rydberg's arnica

WFO wfo-0000083155 Accepted WFO 2026-06 8 photographs CC BY

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.

Arnica rydbergii, photographed by Matt Lavin
fig. a Matt Lavin, CC BY 4.0 / 2020-07-10 / obs. 178699007
Arnica rydbergii, photographed by Alan Covington
fig. b Alan Covington, CC BY 4.0 / obs. 149505310
Arnica rydbergii, photographed by J Straka
fig. c J Straka, CC BY 4.0 / obs. 155026727
Arnica rydbergii, photographed by Matt Lavin
fig. d Matt Lavin, CC BY 4.0 / obs. 178699004
Arnica rydbergii, photographed by Alan Covington
fig. e Alan Covington, CC BY 4.0 / obs. 149505322
Arnica rydbergii, photographed by Matt Lavin
fig. f Matt Lavin, CC BY 4.0 / obs. 178699009
Arnica rydbergii, photographed by Matt Lavin
fig. g Matt Lavin, CC BY 4.0 / obs. 178699011
Arnica rydbergii, photographed by J Straka
fig. h J Straka, CC BY 4.0 / obs. 155026704

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 9 botanical countries

Regions where Arnica rydbergii is native: Alberta, British Columbia, Colorado, Idaho, Montana, Oregon, Utah, Washington, Wyoming AlbertaBritish ColumbiaColoradoIdahoMontanaOregonUtahWashingtonWyoming
Native distribution of Arnica rydbergii, 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
Alberta ABT NORTHERN AMERICA
British Columbia BRC
Colorado COL
Idaho IDA
Montana MNT
Oregon ORE
Utah UTA
Washington WAS
Wyoming WYO

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 7 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.

  • Arnica aurantiaca Greene
  • Arnica caespitosa A.Nelson
  • Arnica cascadensis H.St.John
  • Arnica lasiosperma Greene
  • Arnica rydbergii var. rydbergii
  • Arnica sulcata Rydb.
  • Arnica tenuis 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.