Seeds of South Australia
Acacia triquetra (Leguminosae)
Mallee Wreath Wattle
List of species for Acacia
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Seed collecting:
November to December
Herbarium regions:
Eyre Peninsula, Northern Lofty, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South East
IBRA regions
Kangaroo Island (KAN01)Kanmantoo
 Least Concern
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern
Eyre Hills (EYB03) 
 Least Concern
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Least Concern
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. Triquetra from the Latin 'triquetrus' meaning three edged or three angled.
Distribution:
Endemic to South Australia and restricted to the Eyre and Yorke Peninsulas and Kangaroo Island, growing in coastal sand and limestone, sometimes on coastal cliffs or in swampy scrub and in mallee association.
Status:
Native. Common in South Australia.
Plant description:
A spreading, glabrous shrub to 1.5 m tall. Branchlets angled towards apex and ribbed below leaf bases. Leaves to 25 mm long and 6 mm wide, narrowly oblong, oblanceolate to elliptic, abruptly narrowed at the more or less rounded and excentrically beaked apex; usually inclined to ascending, straight or slightly curved. Inflorescence axillary, with 1-2 globular, yellow flower-heads. Flowering between July and October.
Fruit type:
Dark brown, linear pod to 60 mm long and 4 mm wide, straight to shallowly curved.
Seed type:
Hard, black reniform seed to 3 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 one collection, the seed viability was high, at 90%.
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
11350 (74 g)
11350 (74 g)
100+30-Nov-2006TST112
Yorke Peninsula
1-Aug-200790%-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.