Seeds of South Australia
Atriplex acutiloba (Chenopodiaceae)
Pointy-leaf Saltbush
List of species for Atriplex
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Seed collecting:
October to December
Herbarium regions:
Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Murray
NRM regions:
Eyre Peninsula, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
Olary Spur (FLB03)Flinders Lofty Block
 Rare   (IUCN: RA d(i))
Northern Flinders (FLB05) 
 Near Threatened   [sparse distribution ]
Central Flinders (FLB06) 
 Near Threatened   [sparse distribution ]
Braemer (MDD07)Murray Darling Depression
 Rare   (IUCN: RA d(i))
Gawler Lakes (GAW03)Gawler
 Rare   (IUCN: RA d(i,ii))   [southern limit]
Barrier Range (BHC01)Broken Hill Complex
 Rare   (IUCN: RA d(i))
Strzelecki Desert (SSD05)Simpson Strzelecki Dunefields
 Rare   (IUCN: RA d(ii))
Witjira (STP06)Stony Plains
 Rare   (IUCN: RA d(ii))   [not a lot around]
Diamantina-Eyre (CHC04)Channel Country
 Rare   (IUCN: RA d(ii))
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. Acutiloba meaning pointed lob, referring to the acutely lobed lamina.
Distribution:
Scattered across the central eastern and north-eastern part of South Australia. Was also recorded for New South Wales but presumed extinct.
Status:
Native. Uncommon in South Australia.
Plant description:
Short-lived perennial shrub to 50 cm high with thin leaves which are hairy on both surfaces and the lamina broadly ovate to broadly elliptic to 4 cm long, acute, acutely lobed, base cuneate. Flowers mixed in clusters, both axillary and forming short disjunct spikes. Flowering between August and September.
Fruit type:
Pale brown, papery fruit to 5 mm long and wide, sessile or subsessile, appressed, free to the base, broadly triangular, more or less tomentose with margins prominently dentate and inflated near the base.
Seed type:
Dark brown, circular convex seed to 1.5 mm long and 1mm 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 cleaned 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.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
7900 (14.24 g)
7900 (14.24 g)
20+7-Sep-2013DJD2717
Lake Eyre
24-Mar-2015100%-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 201416%7dNA Leach in RO water for three days
1% water agar
Incubated under spring/autumn conditions
September 20146%68dNA Soak in 500 mg/L gibberellic acid for 24 hrs
1% water agar
Incubated under spring/autumn conditions
September 20140%NANA None
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)