Euphorbia glareosaPall. ex M.Bieb.

WFO wfo-0000962280 Accepted WFO 2026-06 8 photographs CC BY

Plate 1 figs. a–h · 3 observations

This species has been photographed under an open licence only 3 times, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.

Euphorbia glareosa, photographed by Martin Scheuch
fig. a Martin Scheuch, CC BY 4.0 / 2021-08-17 / obs. 151430075
Euphorbia glareosa, photographed by Martin Scheuch
fig. b Martin Scheuch, CC BY 4.0 / obs. 151430139
Euphorbia glareosa, photographed by Martin Scheuch
fig. c Martin Scheuch, CC BY 4.0 / obs. 151474855
Euphorbia glareosa, photographed by Martin Scheuch
fig. d Martin Scheuch, CC BY 4.0 / obs. 151474902
Euphorbia glareosa, photographed by Martin Scheuch
fig. e Martin Scheuch, CC BY 4.0 / obs. 151474876
Euphorbia glareosa, photographed by sergleb
fig. f sergleb, CC BY 4.0 / obs. 133636869
Euphorbia glareosa, photographed by Martin Scheuch
fig. g Martin Scheuch, CC BY 4.0 / obs. 151430101
Euphorbia glareosa, photographed by Martin Scheuch
fig. h Martin Scheuch, CC BY 4.0 / obs. 151430112

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 8 botanical countries

Regions where Euphorbia glareosa is native: North Caucasus, Transcaucasus, Türkiye, Bulgaria, East European Russia, Krym, Romania, South European Russia North CaucasusTranscaucasusTürkiyeBulgariaEast European RussiaKrymRomaniaSouth European Russia
Native distribution of Euphorbia glareosa, 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
Bulgaria BUL EUROPE
East European Russia RUE
Krym KRY
Romania ROM
South European Russia RUS
North Caucasus NCS ASIA-TEMPERATE
Transcaucasus TCS
Türkiye TUR

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.

Where it actually grows measured, from 350 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -12.2 °C -3.1 °C 1.6 °C
Warmest month, mean daily high 22.6 °C 25.6 °C 28.2 °C
Annual rainfall 437 mm 652 mm 1,031 mm
Rainfall in the driest quarter 75 mm 113 mm 193 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 350 research-grade observations of Euphorbia glareosa 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.

Also published as 26 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.

  • Euphorbia cadrilateri Prodan
  • Euphorbia dobrogensis Prodan
  • Euphorbia dobrogensis f. latibracteata Prodán
  • Euphorbia glareosa subsp. cadrilateri (Prodán) Kuzmanov
  • Euphorbia glareosa subsp. maleevii (Tamamshyan) S.G.Tamamshyan
  • Euphorbia glareosa var. minor Boiss.
  • Euphorbia glareosa var. varnensis Velen.
  • Euphorbia maleevii Tamamsch.
  • Euphorbia nicaeensis f. latibracteata (Prod.) Kuzmanov
  • Euphorbia nicaeensis f. varnensis (Vel.) Kuzmanov
  • Euphorbia nicaeensis subsp. cadrilateri (Prod.) Kuzmanov
  • Euphorbia nicaeensis subsp. dobrogensis (Prod.) Kuzmanov
  • Euphorbia nicaeensis subsp. glareosa (Pall. ex M.Bieb.) Radcl.-Sm.
  • Euphorbia nicaeensis subsp. maleevii (Tamamshyan) Oudejans
  • Euphorbia nicaeensis subsp. volgensis (Krysht.) Oudejans
  • Euphorbia provincialis Noë ex Nyman
  • Euphorbia pseudosaxatilis Kanitz
  • Euphorbia pulverulenta Kit.
  • Euphorbia volgensis Kryshtof.
  • Galarhoeus glareosus (M.Bieb.) Prokh.
  • Galarhoeus volgensis (Krysht.) Prokh.
  • Tithymalus cadrilateri (Prodan) Soják
  • Tithymalus dobrogensis (Prodan) Soják
  • Tithymalus nicaeensis subsp. cadrilateri (Prodan) Soják

and 2 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.
  3. 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.