Seeds of South Australia
Maireana pentagona (Chenopodiaceae)
Hairy Bluebush
List of species for Maireana
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Seed collecting:
October to November
Herbarium region:
Murray
NRM region:
South Australian Murray-Darling Basin
IBRA regions
South Olary Plain (MDD01)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [edge of range]
Murray Mallee (MDD02) 
 Rare   (IUCN: RA d(i,ii))   [needs wet habitat]
Murray Scroll Belt (RIV06)Riverina
 Rare   (IUCN: RA b)   (Probable Decline)   [needs wet habitat]
Torrens (GAW06)Gawler
 Vulnerable   (IUCN: VU D2)   [limited habitat; River Murray sp.]
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 century belgium botanist Adolphe Lemaire and Greek 'penta' five, 'gona' angles
Distribution:
Widespread, especially on heavier red and brown soils. Often found growing in large numbers on cracking grey clay River Murray floodplains.
Status:
Rare in South Australia, common in Victoria and New South Wales, less common in Queensland and Western Australia.
Plant description:
Prostrate or ascending perennial to 20 cm high. Leaves alternate, linear, 7-12 rarely to 20 mm long, appressed-villous. Flowers solitary, bisexual, densely woolly-villous. Flowering August - September.
Fruit type:
Fruiting perianth to 4 mm in diameter, covered with woolly hairs and with a central raised pentagonal area surrounded at its base by a narrow wing which is sometimes divided into 5 short truncate lobes.
Seed type:
Ellipsoid to circular, convex brown seed.
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:
Approximately 50 % of seeds germinated with no treatment. 
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA3000 (10.21 g)5018-May-2007RJB72086
North Western
19-Sep-200880%+5°C, -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
Jun-1254%12 d35 d leached in water 24 h;
1% agar;
Incubated under spring/autumn conditions
Jun-1252%8 d35 d
1% agar;
Incubated under spring/autumn conditions
Jun-1244%12 dNA 30% hydrogen peroxide 10 min, water rinse;
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)