Plants of
South Australia
Atriplex kochiana
Chenopodiaceae
Koch's Saltbush
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Regional Species Conservation Assessments per IBRA subregion.
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Etymology

Atriplex from the Latin 'atriplexum' meaning an orach, a saltbush; an Ancient Latin name for this plant. Kochiana named after Maxwell "Max" Koch (1854-1925), a German-born Australian botanical collector.

Distribution and status

Endemic to South Australia and found only in a few sites around Lake Torrens and Oodnadatta. Native. Very rare in South Australia.
Herbarium regions: Lake Eyre, Gairdner-Torrens, Flinders Ranges
NRM region: South Australian Arid Lands
AVH map: SA distribution map (external link)

Plant description

Erect rounded annual or short-lived perennial shrub to 40cm high. Leaves thin with a scaly sheen on both surfaces; lamina very broadly obovate; base cuneate. Male flowers in glomerules forming continuous or disjunct slender spikes. Female flowers in axillary clusters. Fruits are pale-brown papery fruit, sessile or minutely stipitate; united towards the base into a compressed broadly turbinate tube 0.5-1.5 mm high and 1.5-2.5 mm wide at the apex, expanding above into thin appressed prominently veined fan-shaped valves with sinuate margins, 5-8 mm wide and 2.5 mm high; appendages inflated, compressed, ovate to orbicular;, cordate at the base, equal to or exceeding the valves; attached at the apex of the tube of each bracteole by a short stipe. Seed embryo type is peripheral.

Seed collection and propagation

Collect seeds between October and November. 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. 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.

Seeds stored:
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LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
29,400 (138.5 g)
16,700 (78.57 g)
9-Sep-2013DJD2744
Gairdner-Torrens
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:
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