Seeds of South Australia
Acacia enterocarpa (Leguminosae)
Jumping-jack Wattle
List of species for Acacia
Click on an image to enlarge it
Seed collecting:
October to December
Herbarium regions:
Eyre Peninsula, Yorke Peninsula, South Eastern
NRM regions:
Eyre Peninsula, Northern and Yorke, South East
IBRA regions
Tintinara (NCP04)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU D2)   [new popn. of 500 plants found, inc juveniles, not in decline - D Bickerton]
Southern Yorke (EYB01)Eyre Yorke Block
 Endangered   (IUCN: EN B2ab(i,ii,iii,v); C1)   (Definite Decline)   [grazing a threat to recruitment. Only occurs in a narrow strip. Doug to check rec plan]
Eyre Hills (EYB03) 
 Endangered   (IUCN: EN C2a(i))   (Definite Decline)   [not recruiting well]
Lowan Mallee (MDD04)Murray Darling Depression
 Endangered   (IUCN: EN C2a(i))   (Probable Decline)   [highly restricted]
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. Enterocarpa from the Greek 'enteron' meaning intestine and 'karpos' meaning fruit, referring to the pod being coiled like an intestine.
Distribution:
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.
Status:
Native. Very rare in South Australia. Very rare in Victoria.
Plant description:
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.
Fruit type:
Small, light brown pods covered in scattered hair to 20 mm long and 2 mm wide. Margins prominent, thickened and pale yellow.
Seed type:
Hard, dark brown to black, ovoid to ellipsoid 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 seven collections, the seed viability was high, ranging from 85% to 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
6000 (33.1 g)
6500 (34.2 g)
~10023-Nov-2004DJD42
Yorke Peninsula
31-Mar-200690%-18°C
BGA 
MSB
12722 (82.69 g)
12600 (83 g)
>502-Dec-2004DJD 64
South Eastern
31-Mar-200695%-18°C
BGA 
MSB
13500 (65.88 g)
14000 (68.6 g)
>1007-Dec-2004DJD 70
Eyre Peninsula
31-Mar-200685%-18°C
BGA8800 (40.5 g)60-7029-Nov-2006TST107
Yorke Peninsula
1-Aug-200785%-18°C
BGA885+29-Nov-2006TST108
Yorke Peninsula
1-Aug-200790%-18°C
BGA1950 (9.75 g)30+27-Nov-2008KHB183
Yorke Peninsula
20-Jul-200990%-18°C
BGA1950 (9.75 g)30+27-Nov-2008KHB
Yorke Peninsula
20-Jul-200990%-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.