Erythranthe geyeri(Torr.) G.L.Nesom

roundleaf monkeyflower

WFO wfo-0001333296 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Erythranthe geyeri, photographed by Calinsdad
fig. a Calinsdad, CC0 1.0 / 2022-05-30 / obs. 202035484
Erythranthe geyeri, photographed by Katie Kucera
fig. b Katie Kucera, CC BY 4.0 / obs. 147006989
Erythranthe geyeri, photographed by Tom Kennedy
fig. c Tom Kennedy, CC BY 4.0 / obs. 176926515
Erythranthe geyeri, photographed by Peter Quakenbush
fig. d Peter Quakenbush, CC BY 4.0 / obs. 49169211
Erythranthe geyeri, photographed by aarongunnar
fig. e aarongunnar, CC BY 4.0 / obs. 49626494
Erythranthe geyeri, photographed by Brandon Corder
fig. f Brandon Corder, CC BY 4.0 / obs. 162686611
Erythranthe geyeri, photographed by Chris Friesen
fig. g Chris Friesen, CC BY 4.0 / obs. 133256859
Erythranthe geyeri, photographed by Derek
fig. h Derek, CC BY 4.0 / obs. 87055891

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 27 botanical countries

Regions where Erythranthe geyeri is native: Alberta, Arizona, Colorado, Illinois, Iowa, Kansas, Manitoba, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Michigan, Minnesota, Missouri, Nebraska, Nevada, New Mexico, Oklahoma, Ontario, Pennsylvania, Québec, Saskatchewan, South Dakota, Texas, Utah, Wisconsin, Wyoming AlbertaArizonaColoradoIllinoisIowaKansasManitobaMexico CentralMexico GulfMexico NortheastMexico NorthwestMichiganMinnesotaMissouriNebraskaNevadaNew MexicoOklahomaOntarioPennsylvaniaQuébecSaskatchewanSouth DakotaTexasUtahWisconsinWyoming
Native distribution of Erythranthe geyeri, 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
Colorado COL
Illinois ILL
Iowa IOW
Kansas KAN
Manitoba MAN
Mexico Central MXC
Mexico Gulf MXG
Mexico Northeast MXE
Mexico Northwest MXN
Michigan MIC
Minnesota MIN
Missouri MSO
Nebraska NEB
Nevada NEV
New Mexico NWM
Oklahoma OKL
Ontario ONT
Pennsylvania PEN
Québec QUE
Saskatchewan SAS
South Dakota SDA
Texas TEX
Utah UTA
Wisconsin WIS
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 136 in flower of 140 examined

Peak flowering in Jul. Each bar is the share of Erythranthe geyeri 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. 136 of 140 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 11 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.

  • Mimulus geyeri Torr.
  • Mimulus glabratus A.Gray
  • Mimulus glabratus subsp. fremontii (Benth.) A.L.Grant
  • Mimulus glabratus subsp. fremontii (Benth.) Pennell
  • Mimulus glabratus var. fremontii (Benth.) A.L.Grant
  • Mimulus glabratus var. geyeri (Torr.) A.L.Grant
  • Mimulus glabratus var. jamesii (Torr. & A.Gray ex Benth.) A.Gray
  • Mimulus glabratus var. oklahomensis Fassett
  • Mimulus jamesii Torr. & A.Gray ex Benth.
  • Mimulus jamesii var. fremontii Benth.
  • Mimulus reniformis Engelm. ex Benth.

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. USDA PLANTS Database. common name, checklist symbol MIGL. public domain. 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.