Seeds of South Australia
Euphorbia tannensis ssp. eremophila (Euphorbiaceae)
Bottle Tree Caustic
List of species for Euphorbia
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Seed collecting:
January to December
Herbarium regions:
North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty
NRM regions:
Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
SUMMARY
Fleurieu (KAN02)Kanmantoo
 Rare   (IUCN: RA d(ii))   [undercollected; seen in Finniss River; grows in gorges; limited habitat]
Broughton (FLB02)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Olary Spur (FLB03) 
 Least Concern   (Probable Decline)
Southern Flinders (FLB04) 
 Near Threatened   (Probable Decline)
Northern Flinders (FLB05) 
 Least Concern
Central Flinders (FLB06) 
 Least Concern
St Vincent (EYB02)Eyre Yorke Block
 Critically Endangered   (IUCN: CR B2ab(i,ii,iii))   (Definite Decline)   [Old records]
Eyre Hills (EYB03) 
 Near Threatened
Eyre Mallee (EYB05) 
 Near Threatened
South Olary Plain (MDD01)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))
Murray Mallee (MDD02) 
 Rare   (IUCN: RA d(i,ii))
Braemer (MDD07) 
 Least Concern   (Probable Decline)
Murray Scroll Belt (RIV06)Riverina
 Rare   (IUCN: RA d(i,ii))
Myall Plains (GAW01)Gawler
 Least Concern
Gawler Volcanics (GAW02) 
 Least Concern
Gawler Lakes (GAW03) 
 Least Concern
Arcoona Plateau (GAW04) 
 Least Concern
Kingoonya (GAW05) 
 Least Concern
Torrens (GAW06) 
 Least Concern
Roxby (GAW07) 
 Least Concern
Commonwealth Hill (GAW08) 
 Least Concern
Maralinga (GVD03)Great Victoria Desert
 Least Concern
Kintore (GVD04) 
 Least Concern
Tallaringa (GVD05) 
 Least Concern
Yellabinna (GVD06) 
 Least Concern
Nullarbor Plain (NUL02)Nullarbor
 Least Concern
Barrier Range (BHC01)Broken Hill Complex
 Least Concern   (Probable Decline)
Barrier Range Outwash (BHC04) 
 Least Concern   (Probable Decline)
Bimbowrie (BHC05) 
 Least Concern   (Probable Decline)
Curnamona (BHC06) 
 Least Concern   (Probable Decline)
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Least Concern
Dieri (SSD03) 
 Least Concern
Warriner (SSD04) 
 Least Concern
Strzelecki Desert (SSD05) 
 Least Concern
Breakaways (STP01)Stony Plains
 Least Concern
Oodnadatta (STP02) 
 Least Concern
Murnpeowie (STP03) 
 Least Concern
Peake-Dennison Inlier (STP04) 
 Least Concern
Macumba (STP05) 
 Least Concern
Witjira (STP06) 
 Least Concern
Baltana (STP07) 
 Least Concern
Sturt Stony Desert (CHC02)Channel Country
 Least Concern
Diamantina-Eyre (CHC04) 
 Least Concern
Coongie (CHC06) 
 Least Concern
Lake Pure (CHC07) 
 Least Concern
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern
Watarru (CER02) 
 Least Concern
Everard Block (CER03) 
 Least Concern
Tieyon (FIN03)Finke
 Least Concern
Pedirka (FIN04) 
 Least Concern
IBRA regions
DISPLAY ALL
Fleurieu (KAN02)KanmantooRare
  (IUCN: RA d(ii))   [undercollected; seen in Finniss River; grows in gorges; limited habitat]
5 of 6 subregionsFlinders Lofty BlockLeast Concern
, Near Threatened
, Rare
3 of 5 subregionsEyre Yorke BlockNear Threatened
, Critically Endangered
3 of 6 subregionsMurray Darling DepressionLeast Concern
, Rare
Murray Scroll Belt (RIV06)RiverinaRare
  (IUCN: RA d(i,ii))
8 of 8 subregionsGawlerLeast Concern
4 of 4 subregionsGreat Victoria DesertLeast Concern
Nullarbor Plain (NUL02)NullarborLeast Concern
4 of 4 subregionsBroken Hill ComplexLeast Concern
4 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
7 of 7 subregionsStony PlainsLeast Concern
4 of 4 subregionsChannel CountryLeast Concern
3 of 3 subregionsCentral RangesLeast Concern
2 of 2 subregionsFinkeLeast Concern
RSCA map:
Regional Species Conservation Assessments per IBRA subregion. Please click the thumbnail map.
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Euphorbia]
Name derivation:
Euphorbia named given to an African species by Juba (46 B.C.-19 or 20 A.D.), King of Mauritania, in honour of his Greek physician, Euphorbus, who had discovered its medical uses. Tannensis meaning of or from Tanna, New Hebrides (now known as Republic of Vanuatu) where the species was first collected. Eremophila from the Greek 'eremophiles' meaning loving solitude or desert; referring to the subspecies habitat.
Distribution:
Found across South Australia except on Kangaroo Island and the South-east, growing on heavy clay soils of river and floodplains or skeletal hillside soils, from open grass plains to mulga communities. Also found in all mainland states.
Status:
Native. Common in South Australia. Rare in  Victoria. Common in the other states.
Plant description:
Erect annual or perennial shrub to 50 cm high. Lower stems and branches becoming woody, upper branches green, glaucous. Leaves alternate below, subopposite in upper parts, linear to narrow-ovate, to 70 mm long and 7 mm wide, acute to obtuse, base cuneate, margins entire or serrulate. Flowers solitary, terminal or axillary, small yellow-green. Flowers most of the year.
Fruit type:
Smooth green, ovoid-globose capsule to 5 mm long and wide, erect with 3 cells,1 seed in each cell.
Seed type:
Yellow-brown rectangular seed to 3 mm long and 1.5 mm wide with a granular, mottled surface and a hat-shaped aril. 
Embryo type:
Spatulate.
Seed collecting:
Collect whole stems bearing maturing capsules, those that are fat and turning pale green and contain hard seeds. Be careful when collecting the stems or capsules as the sap can be caustic.
Seed cleaning:
Place the capsules in a tray and leave to dry for one to two weeks. Then rub the capsules by hand or with a rubber bung to dislodge the seeds. Use a sieve to separate the unwanted material. Store the seeds with a desiccant such as dried silica beads or dry rice, in an air tight container in a cool and dry place.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily.