Seeds of South Australia
Maireana astrotricha (Chenopodiaceae)
Grey Bluebush
List of species for Maireana
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Seed collecting:
June to October
Herbarium regions:
North Western, Lake Eyre, 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   (Probable Decline)   [stock grazing plant]
Southern Flinders (FLB04) 
 Near Threatened   (Definite Decline)
Northern Flinders (FLB05) 
 Least Concern   [heavily grazed pastoral sp.; lack of regeneration a threat]
Central Flinders (FLB06) 
 Least Concern   [heavily grazed pastoral sp.; lack of regeneration a threat]
South Olary Plain (MDD01)Murray Darling Depression
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Definite Decline)   [edge of range; highly palatable]
Braemer (MDD07) 
 Least Concern   (Probable Decline)   [stock grazing plant]
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(ii))   (Definite Decline)   [grazed, lack of regeneration]
Gawler Volcanics (GAW02) 
 Near Threatened   (Probable Decline)   [grazed, lack of regeneration]
Gawler Lakes (GAW03) 
 Near Threatened   (Definite Decline)   [grazed, lack of regeneration]
Arcoona Plateau (GAW04) 
 Least Concern
Kingoonya (GAW05) 
 Near Threatened   (Probable Decline)   [grazed, lack of regeneration]
Torrens (GAW06) 
 Least Concern
Roxby (GAW07) 
 Least Concern   [heavily grazed pastoral sp.; lack of regeneration a threat]
Commonwealth Hill (GAW08) 
 Least Concern   [heavily grazed pastoral sp.; lack of regeneration a threat]
Maralinga (GVD03)Great Victoria Desert
 Rare   (IUCN: RA d(ii))   [grazed]
Kintore (GVD04) 
 Least Concern
Barrier Range (BHC01)Broken Hill Complex
 Least Concern   (Probable Decline)   [stock grazing plant]
Barrier Range Outwash (BHC04) 
 Least Concern   (Probable Decline)   [stock grazing plant]
Bimbowrie (BHC05) 
 Least Concern   (Probable Decline)   [stock grazing plant]
Curnamona (BHC06) 
 Least Concern   (Probable Decline)   [stock grazing plant]
Dieri (SSD03)Simpson Strzelecki Dunefields
 Least Concern
Warriner (SSD04) 
 Least Concern   [heavily grazed pastoral sp.; lack of regeneration a threat]
Strzelecki Desert (SSD05) 
 Least Concern
Breakaways (STP01)Stony Plains
 Least Concern   [heavily grazed pastoral sp.; lack of regeneration a threat]
Oodnadatta (STP02) 
 Least Concern   [heavily grazed pastoral sp.; lack of regeneration a threat]
Murnpeowie (STP03) 
 Least Concern   [heavily grazed pastoral sp.; lack of regeneration a threat]
Peake-Dennison Inlier (STP04) 
 Least Concern   [heavily grazed pastoral sp.; lack of regeneration a threat]
Macumba (STP05) 
 Least Concern
Witjira (STP06) 
 Least Concern
Baltana (STP07) 
 Least Concern   [heavily grazed pastoral sp.; lack of regeneration a threat]
Sturt Stony Desert (CHC02)Channel Country
 Least Concern
Coongie (CHC06) 
 Rare   (IUCN: RA d(ii))   [check ID]
Lake Pure (CHC07) 
 Rare   (IUCN: RA d(ii))   [check ID]
Everard Block (CER03)Central Ranges
 Least Concern
Tieyon (FIN03)Finke
 Least Concern   [heavily grazed pastoral sp.; lack of regeneration a threat]
Pedirka (FIN04) 
 Least Concern   [heavily grazed pastoral sp.; lack of regeneration a threat]
IBRA regions
DISPLAY ALL
4 of 6 subregionsFlinders Lofty BlockLeast Concern
, Near Threatened
2 of 6 subregionsMurray Darling DepressionLeast Concern
, Vulnerable
8 of 8 subregionsGawlerLeast Concern
, Near Threatened
, Rare
2 of 4 subregionsGreat Victoria DesertLeast Concern
, Rare
4 of 4 subregionsBroken Hill ComplexLeast Concern
3 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
7 of 7 subregionsStony PlainsLeast Concern
3 of 4 subregionsChannel CountryLeast Concern
, Rare
Everard Block (CER03)Central 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 Maireana]
SA Flora:
Flora of South Australia Edition 5
Name derivation:
Maireana named after Adolphe Lemaire, a 19th century Belgium botanist  Greek 'astron' meaning star and 'trichos' meaning hairs, referring to the branched hairs on the leaves and stems.
Distribution:
Found in well drained gravelly soils in mainland South Australia from Northern Eyre Peninsula across to the eastern and northern borders, not recorded in the Yorke and Fleurieu peninsulas or the South East region.
Status:
Native, common in South Australia, uncommon in Queensland, also recorded in  Northern Territory and New South Wales near the South Australian borders.
Plant description:
Rounded, branched shrub to 1 m high, branches and leaves covered with branched hairs; leaves alternate, fleshy, narrowly to broadly obovoid 5-10 mm long. Flowers and fruits from June to September.
Fruit type:
Fruiting perianth; wing simple, papery, horizontal, c. 15-20 mm diameter, pale- to dark-brown when dry, with a single radial slit; upper perianth convex, thick.
Seed type:
Seed  circular, convex, brown
Embryo type:
Peripheral
Seed collecting:
Collect dry, papery fruits, check that they contain well developed seeds before making a collection. Shake or strip fruits into a vessel.
Seed cleaning:
Remove twigs and other plant material.
Seed viability:
From one collection viability was 53%
Seed germination:
Seeds are non-dormant, high levels of germination were observed with no treatment.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA4970 (83 g)80+6-Sep-2012KHB714
Flinders Ranges
27-Feb-2014 (Xray 53%)-18°C
Location: BGA — the seeds are stored at the Adelaide Botanic Gardens, MSB — the seeds are stored at the Millennium Seed Bank, Kew, England.
Number of plants: This is the number of plants from which the seeds were collected.
Collection location: The Herbarium of South Australia's region name.
% Viability: Percentage of filled healthy seeds determined by a cut test or x-ray.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
May-1392%4 d4 d
1% agar;
Incubated under spring/autumn conditions
May-1386%4 d4 d
1% agar with 250 mg/L gibberellic acid (pH 6.5);
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)