Vernonia fasciculataMichx.

prairie ironweed

WFO wfo-0000123366 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Vernonia fasciculata, photographed by Eug 302
fig. a Eug 302, CC0 1.0 / 2021-09-09 / obs. 156369489
Vernonia fasciculata, photographed by Eric Schmidt
fig. b Eric Schmidt, CC BY 4.0 / obs. 173262557
Vernonia fasciculata, photographed by Marilynn Miller
fig. c Marilynn Miller, CC BY 4.0 / obs. 150825332
Vernonia fasciculata, photographed by Eric Schmidt
fig. d Eric Schmidt, CC BY 4.0 / obs. 159315113
Vernonia fasciculata, photographed by Eric Schmidt
fig. e Eric Schmidt, CC BY 4.0 / obs. 159316645
Vernonia fasciculata, photographed by Eric Schmidt
fig. f Eric Schmidt, CC BY 4.0 / obs. 159319320
Vernonia fasciculata, photographed by Eric Schmidt
fig. g Eric Schmidt, CC BY 4.0 / obs. 152038976
Vernonia fasciculata, photographed by Samuel A Schmid, PhD, PWS
fig. h Samuel A Schmid, PhD, PWS, CC BY 4.0 / obs. 145666037

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 16 botanical countries

Regions where Vernonia fasciculata is native: Colorado, Illinois, Indiana, Iowa, Kansas, Kentucky, Manitoba, Massachusetts, Minnesota, Missouri, Nebraska, North Dakota, Ohio, Oklahoma, South Dakota, Wisconsin ColoradoIllinoisIndianaIowaKansasKentuckyManitobaMassachusettsMinnesotaMissouriNebraskaNorth DakotaOhioOklahomaSouth DakotaWisconsin
Native distribution of Vernonia fasciculata, 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
Colorado COL NORTHERN AMERICA
Illinois ILL
Indiana INI
Iowa IOW
Kansas KAN
Kentucky KTY
Manitoba MAN
Massachusetts MAS
Minnesota MIN
Missouri MSO
Nebraska NEB
North Dakota NDA
Ohio OHI
Oklahoma OKL
South Dakota SDA
Wisconsin WIS

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 9 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.

  • Cacalia fasciculata (Michx.) Kuntze
  • Vernonia corymbosa Schwein.
  • Vernonia fasciculata subsp. corymbosa (Schwein.) S.B.Jones
  • Vernonia fasciculata subsp. fasciculata
  • Vernonia fasciculata var. corymbosa (Schwein.) B.G.Schub.
  • Vernonia fasciculata var. corymbosa (Daniels)
  • Vernonia fasciculata var. fasciculata
  • Vernonia fasciculata var. nebraskensis Gleason
  • Vernonia schweinitzii Steud.

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.