Seeds of South Australia
Atriplex crassipes (Chenopodiaceae)
Duck'd Foot Orache
List of species for Atriplex
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Seed collecting:
January to December
Herbarium region:
Lake Eyre
NRM region:
South Australian Arid Lands
IBRA regions
Northern Flinders (FLB05)Flinders Lofty Block
 Near Threatened
Dieri (SSD03)Simpson Strzelecki Dunefields
 Near Threatened
Strzelecki Desert (SSD05) 
 Least Concern
Breakaways (STP01)Stony Plains
 Near Threatened
Oodnadatta (STP02) 
 Near Threatened
Murnpeowie (STP03) 
 Near Threatened
Witjira (STP06) 
 Near Threatened
Baltana (STP07) 
 Near Threatened
Diamantina-Eyre (CHC04)Channel Country
 Least Concern
Coongie (CHC06) 
 Least Concern
Lake Pure (CHC07) 
 Near Threatened
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. Crassipes from the Latin 'crrassus' meaning fat and 'pes' meaning foot; referring to the base of the fruit which is round and thick like a foot.
Distribution:
Found scattered in the arid north and north-east of South Australia. Also found in Northern Territory, Queensland and New South Wales.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:
Decumbent to erect rounded herb to 30 cm high with sessile or shortly petiolate leaves, scurfy-tomentose on both surfaces, ovate to elliptic, to 15 mm long, thin, obtuse, entire, cuneate to truncate at the base. Flowers in axillary glomerules. Flowers throughout the year.
Fruit type:
Pale brown fruit like a duck's foot to 4 mm long, with a tube base and a flattened, shortly 3-toothed apex with prominently nerved.
Seed type:
Dark brown, globular reniform seed to 1 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.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
August 201574%7dNA None
1% water agar
Incubated under spring/autumn conditions
August 201572%7d7d leach in RO water for 3 days
1% water agar
Incubated under spring/autumn conditions
August 201566%7d7d soak in 250 mg/L gibberellic acid for 24 hrs
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)