Iris missouriensisNutt.

western blue flag

WFO wfo-0000783633 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Iris missouriensis, photographed by Andrew Tree
fig. a Andrew Tree, CC BY 4.0 / 2022-05-31 / obs. 202247755
Iris missouriensis, photographed by Amthinkia
fig. b Amthinkia, CC0 1.0 / obs. 203565838
Iris missouriensis, photographed by James M. Maley
fig. c James M. Maley, CC BY 4.0 / obs. 204806346
Iris missouriensis, photographed by sprcrkwild
fig. d sprcrkwild, CC BY 4.0 / obs. 202338067
Iris missouriensis, photographed by aburame
fig. e aburame, CC BY 4.0 / obs. 145211223
Iris missouriensis, photographed by Juan Cruzado Cortés
fig. f Juan Cruzado Cortés, CC BY-SA 4.0 / obs. 191234566
Iris missouriensis, photographed by Reid Hardin
fig. g Reid Hardin, CC BY 4.0 / obs. 145738359
Iris missouriensis, photographed by CK2AZ
fig. h CK2AZ, CC BY 4.0 / obs. 146368455

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.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Flowering n = 611 observations

Peak flowering in Jun, from 611 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 18 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.

  • Dielsiris arizonica (Dykes) M.B.Crespo, Mart.-Azorín & Mavrodiev
  • Dielsiris missouriensis (Nutt.) M.B.Crespo, Mart.-Azorín & Mavrodiev
  • Dielsiris pariensis (S.L.Welsh) M.B.Crespo, Mart.-Azorín & Mavrodiev
  • Dielsiris pelogonus (Goodd.) M.B.Crespo, Mart.-Azorín & Mavrodiev
  • Iris arizonica Dykes
  • Iris haematophylla var. valametica Herb. ex Hook.
  • Iris longipetala var. montana Baker
  • Iris missouriensis f. alba H.St.John
  • Iris missouriensis f. angustispatha R.C.Foster
  • Iris missouriensis var. albiflora Cockerell
  • Iris missouriensis var. arizonica (Dykes) R.C.Foster
  • Iris missouriensis var. pelogonus (Goodd.) R.C.Foster
  • Iris missuriensis M.Martens
  • Iris montana Nutt. ex Dykes
  • Iris pariensis S.L.Welsh
  • Iris pelogonus Goodd.
  • Iris tolmieana Herb.
  • Limniris missouriensis (Nutt.) Rodion.

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.

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