Seeds of South Australia
Acacia gracilifolia (Leguminosae)
Graceful Wattle
List of species for Acacia
Click on an image to enlarge it
Seed collecting:
October to January
Herbarium regions:
Flinders Ranges, Northern Lofty
NRM regions:
Adelaide and Mount Lofty Ranges, South Australian Arid Lands
IBRA region
Southern Flinders (FLB04)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))   [restricted area]
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. Gracilifolia from the Latin 'gracilis' meaning graceful, slender and 'folium' meaning a leaf.
Distribution:
Endemic to South Australia and restricted to the southern Flinders Ranges and northern Mount Lofty Ranges, growing on rocky hillsides and in gorges in open woodland scrub on shallow compact loam soil.
Status:
Native. Rare in South Australia.
Plant description:
Slender, glabrous, resinous shrubs to 2 m high and wide, with a short slender trunk, dividing into a few ascending branches and branchlets, angular with reddish-brown, resinous ridges. Leaves filiform, to 10 cm long and 1 mm diameter, straight or curved, somewhat compressed, viscid, deeply grooved on either face with 4-6 rather obscure resinous veins; apex with a small oblique mucro. 1-4 small glands are situated along the upper margins of the leaves. Inflorescences simple, 1-3 per axil with short, cylindrical to almost globular, bright yellow flower-heads. Flowering between August and November.
Fruit type:
Linear pod to 7 cm long and 2 mm wide, viscid, raised over seeds, margins slightly constricted, tapering and acute at both ends.
Seed type:
Hard, dark brown to black ellipsoid seed to 6 mm long and 4 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 one collection, the seed viability was high, at 85%.
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
19000 (380.45 g)
19000 (380.45 g)
60+1-Nov-2006DJD642
Northern Lofty
1-Aug-200785%-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.