Seeds of South Australia
Acacia acanthoclada ssp. acanthoclada (Leguminosae)
Harrow Wattle, Mirrinytji
List of species for Acacia
Click on an image to enlarge it
Seed collecting:
October to January
Herbarium regions:
North Western, Nullarbor, Eyre Peninsula, Murray
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Murray-Darling Basin
IBRA regions
Eyre Hills (EYB03)Eyre Yorke Block
 Data Deficient
Eyre Mallee (EYB05) 
 Least Concern
South Olary Plain (MDD01)Murray Darling Depression
 Least Concern
Murray Mallee (MDD02) 
 Least Concern   [restricted to deeper sand]
Lowan Mallee (MDD04) 
 Least Concern
Murray Scroll Belt (RIV06)Riverina
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [atypical habitat]
Kintore (GVD04)Great Victoria Desert
 Rare   (IUCN: RA d(i,ii))   [outlier]
Yellabinna (GVD06) 
 Least Concern
Watarru (CER02)Central Ranges
 Rare   (IUCN: RA d(i,ii))
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. Acanthoclada from the Greek 'akantha' meaning thorn and 'kladion', from 'klados' meaning a branch; referring to the spine at the end of the branchlets.
Distribution:
Found scattered in the north-western corner of South Australia through the upper Eyre Peninsula to the main distribution in the Murray region, growing in open mallee scrub associated with Eucalyptus socialis and Eucalyptus gracilis on deep red sandy soil, on low sand hills and undulating plains. Also found in Western Australia, New South Wales and Victoria.
Status:
Native. Uncommon in South Australia. Rare in New South Wales. Uncommon in Victoria. Common in Western Australia.
Plant description:
Stiff, intricate, spreading shrub to 2 m high with smooth, grey or occasionally slightly greenish bark. Branchlets short, straight, rigid, with spines and covered in dense hairs. Leaves more or less erect, straight, to 6 mm long and 3 mm wide, hairy with1 or sometimes 2 longitudinal veins,1 minute gland, often appearing absent, at about halfway or sometimes more along margin. Inflorescences single in axil of leaves with bright yellow globular flowers. Flowering between August and October.
Fruit type:
Dark brown twisted or coiled pod to 60 mm long and 3 mm wide, slightly constricted between seeds.
Embryo type:
Investing.
Seed collecting:
Collect mature pods that are turning brown with hard, dark seeds inside. Be careful as the bushes are spiny.
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 germination:
This species has physical dormancy that needs to be overcome for the seed to germinate (e.g. nicking or softening the seed coat).