Euphorbia tannensisSpreng.

WFO wfo-0000965016 Accepted WFO 2026-06 8 photographs CC BY

Plate 1 figs. a–h · 8 separate observations

Euphorbia tannensis, photographed by T. Hammer
fig. a T. Hammer, CC BY 4.0 / 2021-09-15 / obs. 158129649
Euphorbia tannensis, photographed by Kym Nicolson
fig. b Kym Nicolson, CC BY 4.0 / obs. 102360473
Euphorbia tannensis, photographed by Kym Nicolson
fig. c Kym Nicolson, CC BY 4.0 / obs. 98643345
Euphorbia tannensis, photographed by Kym Nicolson
fig. d Kym Nicolson, CC BY 4.0 / obs. 93673600
Euphorbia tannensis, photographed by Kym Nicolson
fig. e Kym Nicolson, CC BY 4.0 / obs. 86692027
Euphorbia tannensis, photographed by Kym Nicolson
fig. f Kym Nicolson, CC BY 4.0 / obs. 88657748
Euphorbia tannensis, photographed by Kym Nicolson
fig. g Kym Nicolson, CC BY 4.0 / obs. 82261087
Euphorbia tannensis, photographed by Kym Nicolson
fig. h Kym Nicolson, CC BY 4.0 / obs. 73858832

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
Smithsonian, US National Herbarium
Accession
US 2739031
Filed as
Euphorbia tannensis Spreng.
Det. by
not recorded on this sheet
Collected
F. R. Fosberg 1973-06-26
Origin
AU
The sheet
View the digitised specimen (CC0 1.0)

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 8 botanical countries

Regions where Euphorbia tannensis is native: New South Wales, Northern Territory, Queensland, South Australia, Victoria, Western Australia, New Caledonia, Vanuatu New South WalesNorthern TerritoryQueenslandSouth AustraliaVictoriaWestern AustraliaNew Caledonia Vanuatu
Native distribution of Euphorbia tannensis, 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
New South Wales NSW AUSTRALASIA
Northern Territory NTA
Queensland QLD
South Australia SOA
Victoria VIC
Western Australia WAU
New Caledonia NWC PACIFIC
Vanuatu VAN

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 89 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low 5.4 °C 9.4 °C 19.7 °C
Warmest month, mean daily high 26.4 °C 32.1 °C 38.2 °C
Annual rainfall 181 mm 353 mm 1,355 mm
Rainfall in the driest quarter 15 mm 46 mm 160 mm

It is barely found anywhere that freezes. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 89 research-grade observations of Euphorbia tannensis 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 17 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.

  • Croton clutioides G.Forst.
  • Euphorbia clutioides (G.Forst.) C.A.Gardner
  • Euphorbia deserticola F.Muell.
  • Euphorbia eremocarpus Pharm ex Wehmer
  • Euphorbia eremophila A.Cunn. ex T.Mitch.
  • Euphorbia eremophila var. dracunculina Baill.
  • Euphorbia eremophila var. filiformis Baill.
  • Euphorbia eremophila var. genuina Baill.
  • Euphorbia eremophila var. latifolia Boiss.
  • Euphorbia eremophila var. microdendron Baill.
  • Euphorbia eremophila var. oblonga Domin
  • Euphorbia eremophila var. phyllanthina Baill.
  • Euphorbia eremophila var. typica Domin
  • Euphorbia finlaysonii J.M.Black
  • Euphorbia tannensis var. eremophila (A.Cunn.) D.C.Hassall
  • Euphorbia tannensis var. finlaysonii (J.M.Black) D.C.Hassall
  • Euphorbia vieillardii Baill.

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.