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. Enterocarpa from the Greek 'enteron' meaning intestine and 'karpos' meaning fruit, referring to the pod being coiled like an intestine.
Distribution and status
Restricted to a number of locations in South-Eastern, Yorke Peninsula and Eyre Peninsula regions, growing in woodland to open, forest with sandy alkaline and hard neutral yellow duplex, red shallow porous loam and grey cracking and self-mulching clays soils. Also found in Victoria. Native. Very rare in South Australia. Very rare in Victoria.
Herbarium regions: Eyre Peninsula, Yorke Peninsula, South Eastern
NRM regions: Eyre Peninsula, Northern and Yorke, South East
AVH map: SA distribution map (external link)
Small, dense, much branched prickly shrubs, to 1.5 m high and usually spreading the same or more across, with reddish-brown stems. Leaves linear to 4.5 cm long and 1 mm diameter, straight or slightly curved; rigid, almost terete with apex contracting suddenly into a sharp reddish-brown, rigid point. Inflorescences simple and axillary, solitary, mostly twin or sometimes ternate with globular, bright yellow flower-heads. Flowering between May and October. Fruits are small, light brown pods covered in scattered hair to 20 mm long and 2 mm wide. Margins prominent, thickened and pale yellow. Seeds are hard, dark brown to black, ovoid to ellipsoid seed to 3 mm long and 2 mm wide. Seed embryo type is investing.
Seed collection and propagation
Collect seeds between October and December. 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. From seven collections, the seed viability was high, ranging from 85% to 90%. 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|
|12,600 (83 g)|
12,600 (83 g)
|6,500 (34.2 g)|
6,500 (34.2 g)
|14,000 (68.6 g)|
14,000 (68.6 g)
|BGA||8,800 (40.5 g)||70||29-Nov-2006||TST107|
|BGA||1,950 (9.75 g)||30+||27-Nov-2008||KHB183|