Seeds of South Australia
Atriplex humifusa (Chenopodiaceae)
List of species for Atriplex
Display more images
Click on an image to enlarge it
Seed collecting:
April to August
Herbarium region:
Lake Eyre
NRM region:
South Australian Arid Lands
IBRA region
Oodnadatta (STP02)Stony Plains
 Rare   (IUCN: RA d(ii))   [undercollected; ephemeral; lack of data to call Vulnerable]
Baltana (STP07) 
 Rare   (IUCN: RA d(ii))   [undercollected; ephemeral; lack of data to call Vulnerable]
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. Humifusa from the Latin 'humus' meaning low- growing,alluding to its prostrate habit.
Distribution:
Found in a few areas north-east of Copper Pedy in South Australia, growing in red clayey loam. Also found in Northern Territory and Queensland.
Status:
Native. Rare in South Australia. Common in the other States.
Plant description:
Rounded annual or short-lived perennial shrub to 30 cm high. Leaves thin, subsessile or shortly petiolate; elliptic, ovate to obovate, to 30 mm long; apex obtuse to acute;, upper surface smooth, hairless and lower surface similar or scurfy. Male flowers in small glomerule to 3 mm diameter in axils or forming small spike. Female flowers in axillary clusters.
Fruit type:
Pink to red or pale brown, thin papery fruit to 5 mm long with a serrated edge.
Seed type:
Smooth, dark red to black, globular reniform seed to 1.5 mm long and wide.
Embryo type:
Peripheral.
Seed collecting:
Collect fruits that are starting to turn pale brown, drying off and papery. 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 40%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
9950 (45 g)
9950 (45 g)
3-Apr-2007RJB71311
Eastern
1-Aug-200740%+5°C, -18°C
BGA 
MSB
14550 (55.29 g)
10700 (40.8 g)
DJD2686
Lake Eyre
24-Mar-201595%+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
September 201474%7d28d None
1% water agar
Incubated under spring/autumn conditions
September 201456%13d43d Soak in 500 mg/L gibberellic acid for 24 hrs
1% water agar
Incubated under spring/autumn conditions
September 201452%7d43d Leach in RO water for 3 days
1% water 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)