Plants of
South Australia
Acacia provincialis
Leguminosae
Swamp Wattle
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Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
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Botanical art

Kath Alcock paintings: 2.

Etymology

Acacia from the Greek 'akakia' and derived from 'ake' or 'akis' meaning a sharp point or thorn and 'akazo' meaning to sharpen. Dioscorides, the Greek physician and botanist used the word in the 1st century AD for the Egyptian thorn tree, Acacia arabica. Provincialis relates to the description from cultivated specimens grown in France from the Provence Region.

Distribution and status

Found in the Mount Lofty Ranges and on Kangaroo Island in South Australia, growing in wet areas in creeks and swamps. Also found in Victoria. Native. Common in South Australia. Common in Victoria.
Herbarium regions: Southern Lofty, Kangaroo Island, South Eastern
NRM regions: Adelaide and Mount Lofty Ranges, Kangaroo Island, South East
AVH map: SA distribution map (external link)

Plant description

Slender, erect to medium-spreading tree to 10 m tall with solitary trunk or often dividing near ground level into several ascending stems; crowns open to bushy. Branchlets reddish brown, often lightly pruinose; prominently flattened and angular, ribbed; often continuous below, decurrent down the stems at first but soon terete, glabrous. Bark smooth, grey. Leaves variable (according to growth phase of plants, habitat and seasonal conditions) from 100 mm to 150mm long and 4 to 35 mm wide; straight or shallowly recurved, glabrous, blue-green to grey-green. Inflorescences racemose with globular, golden to pale yellow flower-heads. Flowering between October and December. Fruits are linear brown pod to 160 mm long and 8 mm wide. Seeds are hard, dark brown to black seed to 6 mm long and 3 mm wide. Seed embryo type is investing.

Seed collection and propagation

Collect seeds between November and January. Collect mature pods that are turning brown, with hard, dark seeds inside. Place the pods in a tray and leave to dry for 1-2 weeks or until the pods begin to split. Then rub the dried pods to dislodge the seeds. Use a sieve to separate any 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. From one collection, the seed viability was high, at 100%. This species has physical dormancy that needs to be overcome for the seed to germinate (e.g. nicking or softening the seed coat).

Seeds stored:
  Hide
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
27,900 (279 g)
27,900 (279 g)
100+15-Dec-2004MKJ52
Kangaroo Island
31-Mar-2006100%-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.