Plants of
South Australia
Acacia cupularis
Leguminosae
Coast Umbrella-bush
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Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
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Oodnadatta
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Keith
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Botanical art

Kath Alcock paintings: 10.

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. Cupularis from Latin meaning a little cup.

Distribution and status

Found in sub-coastal regions of South Australia from the west coast, southern Eyre Peninsula, Yorke Peninsula, Adelaide plains, Fleurieu Peninsula, the eastern end of Kangaroo Island, and the Murray lakes to the South East, as far inland as Bordertown, growing in sand, dunes or in silt or sandy clay. Also found in Western Australia and Victoria. Native. Common in South Australia. Common in the other States.
Herbarium regions: Nullarbor, Flinders Ranges, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions: Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
AVH map: SA distribution map (external link)

Plant description

Rounded shrubs to 2 m high and wide, glabrous with older stems grey and smooth and branchlets mostly dark red-brown, often slightly pruinose. Leaves erect, glaucous to dark green, narrowly linear to 7 cm long and 4 mm wide; more or less thick, finely wrinkled when dry, flat, straight, midrib not prominent. Inflorescences axillary raceme with 2-3 globular, golden-yellow flowers. Flowering between August and November. Fruits are long, smooth or finely striate, dark brown pod to 7 cm long and 5 mm wide, breaking readily. Seeds are hard, pale brown, elliptical to ovoid seed to 5 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. Seed viability is usually high. 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
BGA2,200 (43.48 g)424-Dec-2005KHB26
Murray
1-Aug-200690%-18°C
BGA6,700 (81.55 g)430-Dec-2005KHB32
Flinders Ranges
1-Aug-2006100%-18°C
BGA 
MSB
3,200 (78.56 g)
3,200 (78.56 g)
25+20-Dec-2005KHB22
Southern Lofty
1-Aug-200695%-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.