Seeds of South Australia
Maireana pyramidata (Chenopodiaceae)
Shrubby Bluebush
List of species for Maireana
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Seed collecting:
September to February
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
SUMMARY
Broughton (FLB02)Flinders Lofty Block
 Least Concern   (Probable Increase)
Olary Spur (FLB03) 
 Least Concern   (Probable Increase)   [likes disturbance]
Southern Flinders (FLB04) 
 Least Concern   (Probable Increase)   [likes disturbance]
Northern Flinders (FLB05) 
 Least Concern
Central Flinders (FLB06) 
 Least Concern
St Vincent (EYB02)Eyre Yorke Block
 Least Concern   (Probable Decline)
Eyre Hills (EYB03) 
 Rare   (IUCN: RA d(i,ii))   [southern limit]
Eyre Mallee (EYB05) 
 Near Threatened
South Olary Plain (MDD01)Murray Darling Depression
 Least Concern   [edge of range]
Murray Mallee (MDD02) 
 Least Concern   [edge of range]
Braemer (MDD07) 
 Least Concern   (Probable Increase)   [likes disturbance]
Murray Scroll Belt (RIV06)Riverina
 Least Concern   [edge of range]
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
Tallaringa (GVD05)Great Victoria Desert
 Near Threatened
Barrier Range (BHC01)Broken Hill Complex
 Least Concern   (Probable Increase)   [likes disturbance]
Barrier Range Outwash (BHC04) 
 Least Concern   (Probable Increase)   [likes disturbance]
Bimbowrie (BHC05) 
 Least Concern   (Probable Increase)   [likes disturbance]
Curnamona (BHC06) 
 Least Concern   (Probable Increase)   [likes disturbance]
Dieri (SSD03)Simpson Strzelecki Dunefields
 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
Lake Pure (CHC07) 
 Rare   (IUCN: RA d(ii))   [cattle ]
Pedirka (FIN04)Finke
 Rare   (IUCN: RA d(ii))   [out of range]
IBRA regions
DISPLAY ALL
5 of 6 subregionsFlinders Lofty BlockLeast Concern
3 of 5 subregionsEyre Yorke BlockLeast Concern
, Near Threatened
, Rare
3 of 6 subregionsMurray Darling DepressionLeast Concern
Murray Scroll Belt (RIV06)RiverinaLeast Concern
  [edge of range]
8 of 8 subregionsGawlerLeast Concern
Tallaringa (GVD05)Great Victoria DesertNear Threatened
4 of 4 subregionsBroken Hill ComplexLeast Concern
3 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
7 of 7 subregionsStony PlainsLeast Concern
2 of 4 subregionsChannel CountryLeast Concern
, Rare
Pedirka (FIN04)FinkeRare
  (IUCN: RA d(ii))   [out of range]
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' after the 19th certury belgium botanist Adolphe Lemaire and 'pyramidata' pyramid shaped
Distribution:
Widespread in drier areas on calcareous or slightly saline heavy soil
Status:
No information available.
Plant description:
Divaricately branched perennial shrub to 1.5 m high. Leaves alternate, spreading, subterete, acute, 2-6 mm long, shortly appressed-pubescent. Flowers predominantly unisexual, shortly woolly. Flowering all year round.
Fruit type:
Fruiting perianth brown to black when dry; tube sparsely hairy; horizontal wing 10–15 mm diam., faintly veined, with or without a radial slit; upper perianth columnar, 2–4 mm high, 5-lobed, softly hairy
Seed type:
Seeds are brown and disc shaped, up to 1.5 mm diameter with overlapping embryo tip forming a small beak.
Embryo type:
Peripheral
Seed collecting:
Collect seeds when fruits are brown and papery. Check inside several fruits for the presence of well developed seed before making a collection. Strip or shake fruiting branches into a container.
Seed cleaning:
Remove twigs and other plant material.
Seed germination:
Germination 100% on 1% w/v agar, 8/16 dark/light, 20°C.  See http://data.kew.org/sid
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Mar-14100%8 d8 d seeds excised from fruit;
1% agar;
Incubated under spring/autumn conditions
Mar-14100%8 d8 d seeds excised from fruit;
1% agar;
Incubated under winter conditions
Mar-1496%8 d8 d
1% agar;
Incubated under spring/autumn conditions
Mar-1492%8 d8 d
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)