Argemone polyanthemos(Fedde) Ownbey

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WFO wfo-0000547088 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Argemone polyanthemos, photographed by guppin
fig. a guppin, CC0 1.0 / 2022-06-03 / obs. 204467042
Argemone polyanthemos, photographed by Henggang Cui
fig. b Henggang Cui, CC0 1.0 / obs. 157834758
Argemone polyanthemos, photographed by Henggang Cui
fig. c Henggang Cui, CC0 1.0 / obs. 157834776
Argemone polyanthemos, photographed by Daniel Atha
fig. d Daniel Atha, CC0 1.0 / obs. 145262271
Argemone polyanthemos, photographed by Rachel Stringham
fig. e Rachel Stringham, CC BY 4.0 / obs. 149328951
Argemone polyanthemos, photographed by Shalana Gray
fig. f Shalana Gray, CC BY 4.0 / obs. 140750968
Argemone polyanthemos, photographed by Raesha Svatora
fig. g Raesha Svatora, CC BY 4.0 / obs. 139390343
Argemone polyanthemos, photographed by Brian Finzel
fig. h Brian Finzel, CC BY-SA 4.0 / obs. 172946073

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 10 botanical countries

Regions where Argemone polyanthemos is native: Colorado, Kansas, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, South Dakota, Texas, Wyoming ColoradoKansasMontanaNebraskaNew MexicoNorth DakotaOklahomaSouth DakotaTexasWyoming
Native distribution of Argemone polyanthemos, 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
Kansas KAN
Montana MNT
Nebraska NEB
New Mexico NWM
North Dakota NDA
Oklahoma OKL
South Dakota SDA
Texas TEX
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.

Flowering 182 in flower of 200 examined

Peak flowering in Jun. Each bar is the share of Argemone polyanthemos observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 182 of 200 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 5 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 2 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.

  • Argemone intermedia var. polyanthemos Fedde
  • Argemone polyanthemos f. rosea Waterf.

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.