Glaucium corniculatum(L.) Curtis

blackspot hornpoppy

WFO wfo-0001090276 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Glaucium corniculatum, photographed by Edmundas Greimas
fig. a Edmundas Greimas, CC BY 4.0 / 2022-05-22 / obs. 200050433
Glaucium corniculatum, photographed by Kostas Zontanos
fig. b Kostas Zontanos, CC BY 4.0 / obs. 186924084
Glaucium corniculatum, photographed by Tim Johnson
fig. c Tim Johnson, CC BY 4.0 / obs. 185028040
Glaucium corniculatum, photographed by Liubov Ilminska
fig. d Liubov Ilminska, CC0 1.0 / obs. 197263357
Glaucium corniculatum, photographed by Dmitriy Bochkov
fig. e Dmitriy Bochkov, CC BY 4.0 / obs. 158329933
Glaucium corniculatum, photographed by Galyna Mykytynets
fig. f Galyna Mykytynets, CC BY 4.0 / obs. 137006663
Glaucium corniculatum, photographed by Anna Petrosyan
fig. g Anna Petrosyan, CC BY 4.0 / obs. 162490602
Glaucium corniculatum, photographed by Viola Alekseeva
fig. h Viola Alekseeva, CC0 1.0 / obs. 132887102

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.

The specimen a real sheet, in a real collection

Herbarium
The New York Botanical Garden
Accession
02236156
Filed as
Glaucium corniculatum (L.) Rudolph
Det. by
M. T. Davlianidze 2004-01-01
Collected
M. T. Davlianidze 2004-06-12
Origin
GE
The sheet
View the digitised specimen (CC BY 4.0)

A real pressed plant, in a real collection, under the accession number above. Not an illustration of one. The holding institution does not serve this sheet’s image to third parties, so there is no photograph here. The record is real and the link goes to it. Where we hold no openly licensed sheet for a species this section is simply absent, and where a sheet never recorded who determined it, that field stays empty rather than being filled in. Roughly half of all herbarium sheets never recorded a determiner, which is ordinary.

Native range 45 botanical countries

Regions where Glaucium corniculatum is native: Algeria, Canary Is., Egypt, Libya, Madeira, Morocco, Tunisia, Cyprus, Iran, Iraq, Kazakhstan, Kirgizstan, Kuwait, Lebanon-Syria, North Caucasus, Palestine, Saudi Arabia, Sinai, Transcaucasus, Türkiye, Turkmenistan, New South Wales, Northern Territory, Queensland, Victoria, Western Australia, Baleares, Bulgaria, Corse, East European Russia, France, Greece, Hungary, Italy, Kriti, Krym, NW. Balkan Pen., Portugal, Romania, Sardegna, Sicilia, South European Russia, Spain, Türkiye-in-Europe, Ukraine AlgeriaEgyptLibyaMoroccoTunisiaCyprusIranIraqKazakhstanKirgizstanKuwaitLebanon-SyriaNorth CaucasusPalestineSaudi ArabiaSinaiTranscaucasusTürkiyeTurkmenistanNew South WalesNorthern TerritoryQueenslandVictoriaWestern AustraliaBulgariaCorseEast European RussiaFranceGreeceHungaryItalyKritiKrymNW. Balkan Pen.PortugalRomaniaSiciliaSouth European RussiaSpainTürkiye-in-EuropeUkraine Canary Is.MadeiraBalearesSardegna
Native distribution of Glaucium corniculatum, 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. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Baleares BAL EUROPE
Bulgaria BUL
Corse COR
East European Russia RUE
France FRA
Greece GRC
Hungary HUN
Italy ITA
Kriti KRI
Krym KRY
NW. Balkan Pen. YUG
Portugal POR
Romania ROM
Sardegna SAR
Sicilia SIC
South European Russia RUS
Spain SPA
Türkiye-in-Europe TUE
Ukraine UKR
Cyprus CYP ASIA-TEMPERATE
Iran IRN
Iraq IRQ
Kazakhstan KAZ
Kirgizstan KGZ
Kuwait KUW
Lebanon-Syria LBS
North Caucasus NCS
Palestine PAL
Saudi Arabia SAU
Sinai SIN
Transcaucasus TCS
Türkiye TUR
Turkmenistan TKM
Algeria ALG AFRICA
Canary Is. CNY
Egypt EGY
Libya LBY
Madeira MDR
Morocco MOR
Tunisia TUN
New South Wales NSW AUSTRALASIA
Northern Territory NTA
Queensland QLD
Victoria VIC
Western Australia WAU

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 180 in flower of 194 examined

Peak flowering in Feb. Each bar is the share of Glaucium corniculatum 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. 180 of 194 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 4 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.

Where it actually grows measured, from 1,541 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -9.4 °C 0.3 °C 9.4 °C
Warmest month, mean daily high 24.3 °C 28.4 °C 33.6 °C
Annual rainfall 271 mm 496 mm 758 mm
Rainfall in the driest quarter 11 mm 80 mm 146 mm

It is found where winters bring hard frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 1,541 research-grade observations of Glaucium corniculatum that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one. Climate from CHELSA V2.1 (Karger et al. 2017); occurrences from 10.15468/dl.cgje2x.

Also published as 24 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 aurantiacum Salisb.
  • Chelidonium corniculatum L.
  • Chelidonium glabrum Mill.
  • Chelidonium phoeniceum (Crantz) Lam.
  • Chelidonium rubrum Poir.
  • Glaucium aurantiacum Martrin-Donos
  • Glaucium aureum K.Koch
  • Glaucium caricum Stapf
  • Glaucium corniculatum f. pinnatifidum Kuntze
  • Glaucium corniculatum var. aurantiacum (Martrin-Donos) Rouy & Foucaud
  • Glaucium corniculatum var. caricum (Stapf) Kuntze
  • Glaucium corniculatum var. flaviflorum DC.
  • Glaucium corniculatum var. phoeniceum (Crantz) DC.
  • Glaucium corniculatum var. purpureum E.Rev.
  • Glaucium corniculatum var. rubrum (Sm.) Boiss.
  • Glaucium corniculatum var. sublobatum Kuntze
  • Glaucium corniculatum var. tricolor Loret & Barrandon
  • Glaucium corniculatum var. tricolor (Bernh.) Ledeb.
  • Glaucium grenieranum Shuttlew.
  • Glaucium intermedium Link
  • Glaucium phoeniceum Crantz
  • Glaucium rubrum Sm.
  • Glaucium tricolor Bernh. ex Spreng.
  • Mosenthinia glaucium Kuntze

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 GLCO3. 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.