Plagiobothrys scouleri(Hook. & Arn.) I.M.Johnst.

Scouler's popcornflower

WFO wfo-0001215072 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Plagiobothrys scouleri, photographed by Shane Johnson
fig. a Shane Johnson, CC0 1.0 / 2022-05-20 / obs. 199501654

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 25 botanical countries

Regions where Plagiobothrys scouleri is native: Alberta, Arizona, British Columbia, California, Idaho, Maine, Manitoba, Minnesota, Montana, Nebraska, Nevada, New Brunswick, New Mexico, North Dakota, Ontario, Oregon, Pennsylvania, Québec, Saskatchewan, South Dakota, Utah, Washington, Wisconsin, Wyoming, Yukon AlbertaArizonaBritish ColumbiaCaliforniaIdahoMaineManitobaMinnesotaMontanaNebraskaNevadaNew BrunswickNew MexicoNorth DakotaOntarioOregonPennsylvaniaQuébecSaskatchewanSouth DakotaUtahWashingtonWisconsinWyomingYukon
Native distribution of Plagiobothrys scouleri, 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
Arizona ARI
British Columbia BRC
California CAL
Idaho IDA
Maine MAI
Manitoba MAN
Minnesota MIN
Montana MNT
Nebraska NEB
Nevada NEV
New Brunswick NBR
New Mexico NWM
North Dakota NDA
Ontario ONT
Oregon ORE
Pennsylvania PEN
Québec QUE
Saskatchewan SAS
South Dakota SDA
Utah UTA
Washington WAS
Wisconsin WIS
Wyoming WYO
Yukon YUK

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 47 in flower of 50 examined

Proportion of examined Plagiobothrys scouleri in flower, by month
Month In flower Examined Share 95% interval
Jan 0 1 too few examined
Feb 0 0 too few examined
Mar 5 6 83% 44% to 97%
Apr 7 7 100% 65% to 100%
May 15 15 100% 80% to 100%
Jun 13 13 100% 77% to 100%
Jul 5 6 83% 44% to 97%
Aug 1 1 too few examined
Sep 1 1 too few examined
Oct 0 0 too few examined
Nov 0 0 too few examined
Dec 0 0 too few examined

Peak flowering in Apr. Each bar is the share of Plagiobothrys scouleri 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. 47 of 50 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 7 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 20 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.

  • Allocarya cognata Greene
  • Allocarya dispar Piper
  • Allocarya divaricata Piper
  • Allocarya fragilis Brand
  • Allocarya granulata Piper
  • Allocarya hispidula var. penicillata (Greene) Jeps.
  • Allocarya media Piper
  • Allocarya nelsonii Greene
  • Allocarya scouleri (Hook. & Arn.) Greene
  • Eritrichium californicum (Fisch. & C.A.Mey.) DC.
  • Eritrichium plebeium Torr.
  • Eritrichium scouleri (Hook. & Arn.) A.DC.
  • Krynitzkia scouleri (Hook. & Arn.) A.Gray
  • Myosotis scouleri Hook. & Arn.
  • Plagiobothrys cognatus (Greene) I.M.Johnst.
  • Plagiobothrys dispar (Piper) I.M.Johnst.
  • Plagiobothrys granulatus (Piper) I.M.Johnst.
  • Plagiobothrys medius (Piper) I.M.Johnst.
  • Plagiobothrys nelsonii (Greene) I.M.Johnst.
  • Plagiobothrys scouleri var. scouleri

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.