Seeds of South Australia
Acacia strongylophylla (Leguminosae)
Round-leaf Wattle
List of species for Acacia
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Seed collecting:
October to January
Herbarium region:
North Western
NRM region:
Alinytjara Wilurara
IBRA regions
Kintore (GVD04)Great Victoria Desert
 Rare   (IUCN: RA d(ii))   [prickly]
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern   [prickly]
Watarru (CER02) 
 Rare   (IUCN: RA d(ii))   [prickly]
Everard Block (CER03) 
 Least Concern   [prickly]
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. Strongylophylla from the Greek 'strongylos' meaning round and 'phyllon' meaning a leaf.
Distribution:
Found in the far north-west of South Australia, mainly in the Musgrave and Everard Ranges, growing on rocky hillsides and valleys on shallow red, firm, sandy soils and red earth. Also found in Western Australia and Northern Territory.
Status:
Native. Uncommon in South Australia. Rare in Western Australia. Common in Northern Territory.
Plant description:
Erect, glabrous, prickly, straggly shrubs to 3 m high, with slightly flattened branchlets, yellowish-green to reddish-brown, sometimes pruinose; bark smooth thin. Leaves rhomboid-orbicular to 2 cm long and 20 mm wide, flat, dull green or somewhat glaucous  with 1 major vein prominent forming a pungent mucro to 5 mm long; lateral veins oblique and conspicuous. Flower-spike simple and axillary, solitary or twin with  large globular deep golden-yellow flower-heads. Flowering between June and October.
Fruit type:
Brown oblong pod to 8 cm long and 12 mm wide, flat but usually raised over seeds showing the outline of the seeds. Apex rounded obtuse or acute with a short oblique point; margins thickened, straight or with an occasional constriction.
Seed type:
Hard, dark brown to black ovoid seed to 5 mm long and 3.5 mm wide.
Embryo type:
Investing.
Seed collecting:
Collect mature pods that are turning bro, 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 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
2475
2475
314-Dec-2003PJA 57
North Western
1-Sep-2004100%+5°C, -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.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
November 2006100%7d7d Stored at -18°C (1year). Seed coat nicked with scalpel blade.
Wet filter paper placed over wettex sponge. Irrigated with RO water
Incubated under spring/autumn conditions
May 201098%7d7d Stored at -18°C (5 years). Seed coat nicked with scalpel blade
0.7% w/v agar plates
Incubated under spring/autumn conditions
June 200489%7d7d Seed sterilised with 20% Hydrogen Peroxide with 3 drops of Tween (10min). Rinsed in sterile water. Seed coat nicked with scalpel blade.
0.8% w/v agar plates
16/8 dark/light  /  20°C Constant
Result: Maximum percentage of germination observed.
T0: Number of days before first germinant observed.
T50: Number of days to achieve 50% germination.
Pre-treatment: The initial treatment that the seeds received prior to placement on germination media.
Germination medium: The substrate that seeds were placed on for the duration of the germination experiment.
Incubator conditions:
Photoperiod: The duration of light exposure that the seeds were subject to during a 24 hour period.
Thermoperiod: The constant or diurnal temperatures that seeds were subject to during a 24 hour period.
Winter conditions: 15°C 20 h (3am→11pm); 5°C 4 h (11pm→3am) / 10 h light (8am→6pm); 14 h dark (6pm→8am)
Spring/Autumn conditions: 22°C 12 h (8am→8pm); 10°C 12 h (8pm→8am) / 12 h light (8am→8pm); 12 h dark (8pm→8am)
Summer conditions: 30°C 14 h (6am→8pm); 15°C 10 h (8pm→6am) / 14 h light (6am→8pm); 10 h dark (8pm→6am)