Seeds of South Australia
Acacia acinacea (Leguminosae)
Round-leaf Wattle
List of species for Acacia
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Seed collecting:
September to November
Herbarium regions:
Flinders Ranges, Northern Lofty, Murray, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, Northern and Yorke, South Australian Murray-Darling Basin, South East
IBRA regions
SUMMARY
Lucindale (NCP03)Naracoorte Coastal Plain
 Least Concern   [spp complex - could be 4 taxa statewide]
Tintinara (NCP04) 
 Least Concern   [spp complex - could be 4 taxa statewide]
Kangaroo Island (KAN01)Kanmantoo
 Vulnerable   (IUCN: VU D2)   [most pops in roadside reserves; not conserved; highly threatened; used in reveg]
Fleurieu (KAN02) 
 Rare   (IUCN: RA ab)   (Probable Decline)   [less clearance here than MLR; habitat has been highly modified; P Lang: declining, T Croft & M O'leary: stable]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Near Threatened   [stable because of reveg, natural pops prob declining; P Lang: has disappeared from more than 50% of its former habitat; is conserved in parks; is a complex taxa]
Broughton (FLB02) 
 Rare   (IUCN: RA b)   (Probable Decline)   [Taxonomic issues]
Southern Flinders (FLB04) 
 Vulnerable   (IUCN: VU D1+2)
St Vincent (EYB02)Eyre Yorke Block
 Rare   (IUCN: RA b)   (Probable Decline)
Eyre Hills (EYB03) 
 Data Deficient   [not previously on EP]
South Olary Plain (MDD01)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   [poorly collected]
Murray Mallee (MDD02) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [taxo issues this region; needs further study; A cyclophylla/A rotundifolia]
Murray Lakes and Coorong (MDD03) 
 Rare   (IUCN: RA d(i,ii))   [edge of range; spp complex - could be 4 taxa statewide]
Lowan Mallee (MDD04) 
 Near Threatened   [largely restricted to roadsides; suckers]
Wimmera (MDD05) 
 Least Concern   [spp complex - could be 4 taxa statewide]
Murray Scroll Belt (RIV06)Riverina
 Regionally Extinct   [possibly extinct]
IBRA regions
DISPLAY ALL
2 of 4 subregionsNaracoorte Coastal PlainLeast Concern
2 of 2 subregionsKanmantooRare
, Vulnerable
3 of 6 subregionsFlinders Lofty BlockNear Threatened
, Rare
, Vulnerable
2 of 5 subregionsEyre Yorke BlockRare
, Data Deficient
5 of 6 subregionsMurray Darling DepressionLeast Concern
, Near Threatened
, Rare
, Vulnerable
Murray Scroll Belt (RIV06)RiverinaRegionally Extinct
  [possibly extinct]
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. Acinacea from the Latin 'acinaces' a short persian sword, referring to the shape of the phyllodes.
Distribution:
Found in the Mount Lofty Ranges, Kangaroo Island, Flinders Ranges (southern part) and Murray regions. Grows in woodland and open forest on sandy, clay and loam soils. Also found in New South Wales and Victoria.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:
Small, straggly, often spindly and rather loosely-branched shrubs to 1.5 m high with short thin stems that divide into rather long slender arching branches. Phyllodes obliquely obovate or orbicular to 14 mm long, flat, more or less pubescent. Inflorescences simple and axillary, solitary or twin with globular, bright yellow flower-heads. Flowering between May and September.
Fruit type:
Dark brown, linear, spirally coiled pod to 7 cm long and 4 mm wide, glabrous or sometimes sparsely hairy with yellowish, vein-like margins.
Seed type:
Hard, dark brown to black reniform seed to 6 mm long and 3 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 two collections, the seed viability were 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
1750 (17.54 g)
1950 (19.5 g)
~3013-Dec-2004DJD 81
Southern Lofty
31-Mar-200675%-18°C
BGA1800 (21.5 g)30+22-Dec-2010DJD1795
South Eastern
1-Jan-201290%-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.