Plants of
South Australia
Atriplex australasica
Chenopodiaceae
Native Orache
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Regional Species Conservation Assessments per IBRA subregion.
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Near threatened
Rare
Vulnerable
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Extinct
Data deficient
Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
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Botanical art

Kath Alcock paintings: 3.

Etymology

Atriplex from the Latin 'atriplexum' meaning an orache, a saltbush, an Ancient Latin name for this plant. Australasica means of or from Australasia.

Distribution and status

Found mostly in the southern Mount Lofty Ranges and Murray regions, with scattered records on York Peninsula, Kangaroo Island and South-east, growing in blackish soil near the coast. Also found in New South Wales, Victoria and Tasmania. Native. Uncommon in South Australia. Common in the other states.
Herbarium regions: Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern, Green Adelaide
NRM regions: Adelaide and Mount Lofty Ranges, Kangaroo Island, Northern and Yorke, South Australian Murray-Darling Basin, South East
AVH map: SA distribution map (external link)

Plant description

Spreading to erect annual shrub to 1 m high, with quadrangular branches. Lower leaves lanceolate with a cuneate base and margin entire to deeply serrate, often hastate with forwardly directed lobes to 10mm long. This species is similar to the introduced species Atriplex prostata which have lower leaves triangular or hastate with spreading or slightly backwardly directed basal lobes, compared to this species which have lower leaves lanceolate, entire to deeply serrate, if hastate then with forwardly directed basal lobes. Flowers along a long spike, first continuous and later in disjunct clusters. Flowering between January and April. Fruits are fruit deltoid, acute to 4 mm long and wide, united in the lower half or free to the base, entire or with 1 or 2 teeth; smooth or with a warty surface, becoming black and thickened with age. Seeds are dark brown, circular convex seed to 2 mm long and wide. Seed embryo type is peripheral.

Seed collection and propagation

Collect seeds between May and July. Collect fruits that are starting to dry or and turn brown. Fruits can be collected directly from the bush or from the ground underneath. 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. Seed viability is usually high.

Seeds stored:
  Hide
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
42,000 (38.1 g)
42,000 (38.1 g)
20-Apr-2007RJB71421
Southern Lofty
1-Aug-2007100%+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.