Seeds of South Australia
Euphorbia stevenii (Euphorbiaceae)
Bottletree Caustic
List of species for Euphorbia
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Herbarium regions:
Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern
NRM region:
South Australian Arid Lands
IBRA regions
SUMMARY
Southern Flinders (FLB04)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))   [Edge of range, data deficient.]
Northern Flinders (FLB05) 
 Least Concern
Central Flinders (FLB06) 
 Rare   (IUCN: RA d(ii))   [southern edge of range]
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(i,ii))   [comes up after rain]
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(i,ii))   [comes up after rain]
Arcoona Plateau (GAW04) 
 Least Concern
Torrens (GAW06) 
 Least Concern
Roxby (GAW07) 
 Least Concern
Barrier Range (BHC01)Broken Hill Complex
 Rare   (IUCN: RA d(i,ii))   [Data deficient]
Barrier Range Outwash (BHC04) 
 Rare   (IUCN: RA d(i,ii))
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Least Concern
Dieri (SSD03) 
 Least Concern
Warriner (SSD04) 
 Least Concern
Breakaways (STP01)Stony Plains
 Least Concern
Oodnadatta (STP02) 
 Least Concern
Murnpeowie (STP03) 
 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
IBRA regions
DISPLAY ALL
3 of 6 subregionsFlinders Lofty BlockLeast Concern
, Rare
5 of 8 subregionsGawlerLeast Concern
, Rare
2 of 4 subregionsBroken Hill ComplexRare
3 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
6 of 7 subregionsStony PlainsLeast Concern
3 of 4 subregionsChannel CountryLeast 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]
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Jul-1745%14NA seed coat nicked with scalpel
1% agar;
Incubated under winter conditions
Jul-1730%14NA seed coat nicked with scalpel
1% agar;
Incubated under spring/autumn conditions
Jul-1716%14NA 500 mg/L gibberellic acid for 24 h;
1% agar;
Incubated under spring/autumn conditions
Jul-1715%14NA
1% agar;
Incubated under winter conditions
Jul-1712%14NA 500 mg/L gibberellic acid for 24 h;
1% agar;
Incubated under winter conditions
Jul-1710%28NA
1% agar;
Incubated under spring/autumn conditions
Result: Maximum percentage of germination observed.
T0: Number of days before first germinant observed.
T50: Number of days to achieve 50% germination.
Pre-treatment: The initial treatment that the seeds received prior to placement on germination media.
Germination medium: The substrate that seeds were placed on for the duration of the germination experiment.
Incubator conditions:
Photoperiod: The duration of light exposure that the seeds were subject to during a 24 hour period.
Thermoperiod: The constant or diurnal temperatures that seeds were subject to during a 24 hour period.
Winter conditions: 15°C 20 h (3am→11pm); 5°C 4 h (11pm→3am) / 10 h light (8am→6pm); 14 h dark (6pm→8am)
Spring/Autumn conditions: 22°C 12 h (8am→8pm); 10°C 12 h (8pm→8am) / 12 h light (8am→8pm); 12 h dark (8pm→8am)
Summer conditions: 30°C 14 h (6am→8pm); 15°C 10 h (8pm→6am) / 14 h light (6am→8pm); 10 h dark (8pm→6am)