Glaucium flavumCrantz

Yellow Horned Poppy

WFO wfo-0000703573 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Glaucium flavum, photographed by Robert Martin
fig. a Robert Martin, CC BY 4.0 / 2022-06-01 / obs. 202532159
Glaucium flavum, photographed by Tyler Ekholm
fig. b Tyler Ekholm, CC BY 4.0 / obs. 203292808
Glaucium flavum, photographed by Aimee Lusty
fig. c Aimee Lusty, CC BY 4.0 / obs. 205181389
Glaucium flavum, photographed by Emanuele Santarelli
fig. d Emanuele Santarelli, CC BY-SA 4.0 / obs. 205762006
Glaucium flavum, photographed by Jakob Tougaard
fig. e Jakob Tougaard, CC BY 4.0 / obs. 197821884
Glaucium flavum, photographed by Quentin Groom
fig. f Quentin Groom, CC0 1.0 / obs. 198801032
Glaucium flavum, photographed by Daniel Greenwood
fig. g Daniel Greenwood, CC BY 4.0 / obs. 196489321
Glaucium flavum, photographed by Andre Hosper
fig. h Andre Hosper, CC BY 4.0 / obs. 196538327

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.

Flowering n = 932 observations

Peak flowering in May, from 932 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 30 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.

  • Chelidonium fulvum Poir.
  • Chelidonium glaucium L.
  • Chelidonium glaucum Hill
  • Chelidonium littorale Salisb.
  • Glaucium corniculatum f. grandiflorum Kuntze
  • Glaucium corniculatum f. sublobatum Kuntze
  • Glaucium corniculatum var. braunianum Kuntze
  • Glaucium corniculatum var. flavum (Crantz) Kuntze
  • Glaucium corniculatum var. fulvum (Sm.) Kuntze
  • Glaucium corniculatum var. mauritanicum Kuntze
  • Glaucium corniculatum var. tricolor (Godr.) Kuntze
  • Glaucium fischeri Bernh.
  • Glaucium flavum f. obtusilobum Fedde
  • Glaucium flavum f. subleiocarpum Kuzmanov & Gegova
  • Glaucium flavum var. fulvum (Sm.) Fedde
  • Glaucium flavum var. plenum Halácsy
  • Glaucium flavum var. serpieri (Heldr.) Halácsy
  • Glaucium fulvum Sm.
  • Glaucium glaucium (L.) H.Karst.
  • Glaucium glaucum Moench
  • Glaucium littorale Salisb.
  • Glaucium luteum Scop.
  • Glaucium luteum Crantz
  • Glaucium luteum var. glabratum Willk. & Lange

and 6 more.

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.