Seeds of South Australia
Atriplex spongiosa (Chenopodiaceae)
Pop saltbush
List of species for Atriplex
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Seed collecting:
October to December
Herbarium regions:
North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands
IBRA regions
SUMMARY
Olary Spur (FLB03)Flinders Lofty Block
 Least Concern   (Probable Increase)   [likes disturbance]
Southern Flinders (FLB04) 
 Least Concern   (Probable Increase)   [likes disturbance]
Northern Flinders (FLB05) 
 Least Concern   [will be split into ssp; increases on degraded land]
Central Flinders (FLB06) 
 Least Concern   [will be split into ssp; increases on degraded land]
St Vincent (EYB02)Eyre Yorke Block
 Least Concern   (Probable Increase)   [likes disturbance]
Gawler Volcanics (GAW02)Gawler
 Near Threatened
Gawler Lakes (GAW03) 
 Near Threatened
Arcoona Plateau (GAW04) 
 Least Concern
Kingoonya (GAW05) 
 Near Threatened
Roxby (GAW07) 
 Least Concern   [will be split into ssp; increases on degraded land]
Commonwealth Hill (GAW08) 
 Least Concern   [will be split into ssp; increases on degraded land]
Maralinga (GVD03)Great Victoria Desert
 Rare   (IUCN: RA d(ii))   (Definite Decline)
Yellabinna (GVD06) 
 Near Threatened
Nullarbor Plain (NUL02)Nullarbor
 Rare   (IUCN: RA d(ii))   (Definite Decline)
Barrier Range (BHC01)Broken Hill Complex
 Least Concern   (Probable Increase)   [likes disturbance]
Bimbowrie (BHC05) 
 Least Concern   (Probable Increase)   [likes disturbance]
Curnamona (BHC06) 
 Least Concern   (Probable Increase)   [likes disturbance]
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Least Concern   [will be split into ssp; increases on degraded land]
Dieri (SSD03) 
 Least Concern   [will be split into ssp; increases on degraded land]
Warriner (SSD04) 
 Least Concern   [will be split into ssp; increases on degraded land]
Strzelecki Desert (SSD05) 
 Least Concern   [will be split into ssp; increases on degraded land]
Breakaways (STP01)Stony Plains
 Least Concern   [will be split into ssp; increases on degraded land]
Oodnadatta (STP02) 
 Least Concern   [will be split into ssp; increases on degraded land]
Murnpeowie (STP03) 
 Least Concern   [will be split into ssp; increases on degraded land]
Peake-Dennison Inlier (STP04) 
 Least Concern   [will be split into ssp; increases on degraded land]
Macumba (STP05) 
 Least Concern   [will be split into ssp; increases on degraded land]
Witjira (STP06) 
 Least Concern   [will be split into ssp; increases on degraded land]
Baltana (STP07) 
 Least Concern   [will be split into ssp; increases on degraded land]
Sturt Stony Desert (CHC02)Channel Country
 Least Concern   [will be split into ssp; increases on degraded land]
Diamantina-Eyre (CHC04) 
 Least Concern   [will be split into ssp; increases on degraded land]
Coongie (CHC06) 
 Least Concern   [will be split into ssp; increases on degraded land]
Lake Pure (CHC07) 
 Least Concern   [will be split into ssp; increases on degraded land]
Mann-Musgrave Block (CER01)Central Ranges
 Rare   (IUCN: RA d(ii))
IBRA regions
DISPLAY ALL
4 of 6 subregionsFlinders Lofty BlockLeast Concern
St Vincent (EYB02)Eyre Yorke BlockLeast Concern
  (Probable Increase)   [likes disturbance]
6 of 8 subregionsGawlerLeast Concern
, Near Threatened
2 of 4 subregionsGreat Victoria DesertNear Threatened
, Rare
Nullarbor Plain (NUL02)NullarborRare
  (IUCN: RA d(ii))   (Definite Decline)
3 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
Mann-Musgrave Block (CER01)Central RangesRare
  (IUCN: RA d(ii))
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 Atriplex]
SA Flora:
Flora of South Australia Edition 5
Name derivation:
Atriplex from the Latin 'atriplexum' meaning an orach, a saltbush; an Ancient Latin name for this plant. Spongiosa from the Greek 'spongos' meaning a sponge, alluding to the globular fruit.
Distribution:
Found across much of the arid part of South Australia north of Port Augusta, usually in somewhat saline soil. Also found in all mainland states.
Status:
Native. Common in South Australia. Very rare in Victoria. Common in all other states.
Plant description:
Rounded annual or short-lived perennial shrub to 30cm high. Leaves elliptic, broadly elliptic or ovate to 2cm long; acute to obtuse; entire to sinuate-dentate (or rarely deeply serrate); narrowed at the base into a short petiole or sessile, scurfy on both surfaces. Male and female flowers on the same plant. Flowers of both sexes present in axillary glomerules.
Fruit type:
Pale-brown spongy, ovoid fruit to 6mm long with a thin, loosely scurfy texture, supported on a network of fibrous veins.
Seed type:
Pale-brown, reniform seed to 2mm long and 1.5mm wide.
Embryo type:
Peripheral.
Seed collecting:
Collect fruits that are starting to turn pale-brown and drying off. Fruits can be collected directly from the bush or from the ground underneath.
Seed cleaning:
Place the fruits in a tray and leave to dry for one to two weeks. No cleaning is required if only the fruits are collected. The seed can be stored in the fruit or can be clean further. Rub the fruit gently by hand 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 viability:
From one collection, the seed viability was average, at 70%.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
August 201536%NANA None
Soak in 250mg/L gibberellic acid for 24 hrs
Incubated under spring/autumn conditions
August 201534%7dNA None
1% water agar
Incubated under spring/autumn conditions
August 201528%7dNA None
Leach in RO water for 3 days
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)