Seeds of South Australia
Acacia barattensis (Leguminosae)
Baratta Wattle
List of species for Acacia
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Seed collecting:
November to January
Herbarium regions:
Flinders Ranges, Eastern
NRM region:
South Australian Arid Lands
IBRA region
Central Flinders (FLB06)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))   [long-lived seedbank]
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 Acacia]
Name derivation:
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. Barattensis refers to the Baratta Head Station, where this species was first discovered.
Distribution:
Endemic to South Australia and restricted to the eastern Flinders Ranges and just into the Eastern region around the 'Baratta' Homestead area.
Status:
Native. Very rare in South Australia.
Plant description:
Erect, somewhat diffuse, spreading, viscid, aromatic shrubs to 3 m high, with a number of slender branches arising from near ground level. Branches slender, erect angular and very viscid towards their apices, less viscid on older stems and often covered with a blackish sooty substance. Leaves narrow-linear, compressed to 10 cm long and 1.5 mm broad; erect, mostly slightly curved with 3-veined on each face, viscid, sticky and shiny, with a resinous odour . Small gland on upper margin approximately 2-3mm above the base.  Inflorescences simple and axillary, solitary or twin with globular, pale yellow flower-heads. Flowering between April and December.
Fruit type:
Dark brown, flat, straight or slightly curved pods to 15 cm long and 3.5 mm wide, viscid when young. Margins thickened and straw coloured, constricted between the seeds.
Seed type:
Hard dark brown to black, ovoid to oblong seeds to 6 mm long and 2 mm wide.
Embryo type:
Investing.
Seed collecting:
Collect mature pods that are turning brown with hard, dark seeds inside.
Seed cleaning:
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:
From two collections, the seed viability were high, at 85% and 100%.
Seed germination:
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:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
1040 (8.56 g)
1040 (8.56 g)
80+22-Nov-2009KHB317
Flinders Ranges
Jun-2010100%-18°C
BGA700 (5.15 g)20+10-Dec-2009KHB340
Eastern
Jun-201085%-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.