Seeds of South Australia
Maireana pentagona (Chenopodiaceae)
Hairy Bluebush
List of species for Maireana
Display more images
Click on an image to enlarge it
Seed collecting:
October to November
Herbarium region:
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
Widespread, especially on heavier red and brown soils. Often found growing in large numbers on cracking grey clay River Murray floodplains.
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:
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)
of plants
Collection number
Collection location
% ViabilityStorage
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)