Seeds of South Australia
Osteocarpum acropterum var. acropterum (Chenopodiaceae)
Water Weed
List of species for Osteocarpum
Display more images
Click on an image to enlarge it
Herbarium regions:
North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Murray
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
SUMMARY
Olary Spur (FLB03)Flinders Lofty Block
 Least Concern
Southern Flinders (FLB04) 
 Least Concern
Northern Flinders (FLB05) 
 Least Concern
Central Flinders (FLB06) 
 Least Concern
St Vincent (EYB02)Eyre Yorke Block
 Rare   (IUCN: RA d(i))   (Probable Decline)
South Olary Plain (MDD01)Murray Darling Depression
 Near Threatened
Braemer (MDD07) 
 Least Concern
Murray Scroll Belt (RIV06)Riverina
 Least Concern
Myall Plains (GAW01)Gawler
 Near Threatened   (Probable Decline)   [southern limit]
Gawler Volcanics (GAW02) 
 Near Threatened   (Probable Decline)
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(ii))
Arcoona Plateau (GAW04) 
 Rare   (IUCN: RA d(ii))
Torrens (GAW06) 
 Least Concern
Roxby (GAW07) 
 Least Concern
Commonwealth Hill (GAW08) 
 Near Threatened
Maralinga (GVD03)Great Victoria Desert
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Tallaringa (GVD05) 
 Near Threatened
Yellabinna (GVD06) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Nullarbor Plain (NUL02)Nullarbor
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Barrier Range (BHC01)Broken Hill Complex
 Least Concern
Barrier Range Outwash (BHC04) 
 Least Concern
Bimbowrie (BHC05) 
 Least Concern
Curnamona (BHC06) 
 Least Concern
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Least Concern   [undercollected]
Dieri (SSD03) 
 Least Concern
Warriner (SSD04) 
 Least Concern
Strzelecki Desert (SSD05) 
 Least Concern
Oodnadatta (STP02)Stony Plains
 Near Threatened
Murnpeowie (STP03) 
 Least Concern
Macumba (STP05) 
 Least Concern
Witjira (STP06) 
 Near Threatened
Baltana (STP07) 
 Rare   (IUCN: RA d(ii))
Sturt Stony Desert (CHC02)Channel Country
 Least Concern
Diamantina-Eyre (CHC04) 
 Least Concern
Coongie (CHC06) 
 Least Concern
Mann-Musgrave Block (CER01)Central Ranges
 Near Threatened
IBRA regions
DISPLAY ALL
4 of 6 subregionsFlinders Lofty BlockLeast Concern
St Vincent (EYB02)Eyre Yorke BlockRare
  (IUCN: RA d(i))   (Probable Decline)
2 of 6 subregionsMurray Darling DepressionLeast Concern
, Near Threatened
Murray Scroll Belt (RIV06)RiverinaLeast Concern
7 of 8 subregionsGawlerLeast Concern
, Near Threatened
, Rare
3 of 4 subregionsGreat Victoria DesertNear Threatened
, Rare
Nullarbor Plain (NUL02)NullarborRare
  (IUCN: RA d(i,ii))   (Probable Decline)
4 of 4 subregionsBroken Hill ComplexLeast Concern
4 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
5 of 7 subregionsStony PlainsLeast Concern
, Near Threatened
, Rare
3 of 4 subregionsChannel CountryLeast Concern
Mann-Musgrave Block (CER01)Central RangesNear Threatened
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 Osteocarpum]
SA Flora:
Flora of South Australia Edition 5
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
May-173%70
1% agar;
Incubated under winter conditions
May-170%NA 250 mg/L gibberellic acid for 24 h;
1% agar;
Incubated under winter 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)