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. Anceps from the Latin 'anceps' meaning two edged, referring to the flattened angled stems of the species.
Distribution and status
Found scattered along coastal areas of South Australia from the Great Australian Bight to the eastern Eyre Peninsula. Grows in calcareous sand and shallow red-brown sand, in coastal dune vegetation or open scrub. Also found in Western Australia. Native. Common in South Australia. Uncommon in Western Australia.
Herbarium regions: Nullarbor, Eyre Peninsula
NRM regions: Alinytjara Wilurara, Eyre Peninsula
AVH map: SA distribution map (external link)
Erect, rigid, glabrous, spreading shrubs to 3 m high, the same or more across. Stems compressed or flattened and very acutely angled or winged. Phyllodes thick rigid, linear to obovate to 5cm long and 3.5 cm wide. Glands either basal, or near middle on upper margin of leaves. Inflorescences axillary, solitary with large globular, deep golden-yellow flower-head. Flowering between September and February. Fruits are red to brown, flat often undulating pod to 5 cm long and 12mm wide, straight or curved with wrinkled or prominent transverse lines and thick vein-like margins. Seeds are dark brown, black or mottled elliptic seeds to 8 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 airtight container in a cool and dry place. This species has physical dormancy that needs to be overcome for the seed to germinate (e.g. nicking or softening the seed coat).
|Location||No. of seeds|
|13,600 (338 g)|
13,600 (338 g)