Seeds of South Australia
Acacia stricta (Leguminosae)
Straight Wattle
List of species for Acacia
Click on an image to enlarge it
Seed collecting:
November to December
Herbarium regions:
Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Vulnerable   (IUCN: VU D2)   [restricted to swamp-gum woodland; needs fire]
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU D2)   [restricted to swamp-gum woodland; needs fire]
Lucindale (NCP03) 
 Vulnerable   (IUCN: VU D2)   [edge of range; restricted to swamp-gum woodland; needs fire]
Lowan Mallee (MDD04)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))
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. Stricta from the Latin 'strictus' meaning drawn together, straight or erect; referring to its stiff upright habit pecies.
Distribution:
Found in a small localised area in the South-east in South Australia between Millicent and Mount Gambier. Grows with Eucalyptus baxteri with heath understorey, often in damp areas. Also found in Queensland, New South Wales, Victoria and Tasmania.
Status:
Native. Rare in South Australia. Common in the other states.
Plant description:
Tall, erect, dull green, or slightly glaucous and sometimes viscid shrubs to 4 m high, with ascending, angular, striate branches with resinous ridges on the young branchlets. Leaves linear-lanceolate to narrow-linear or oblong to 12 cm long and 15 mm broad, flat, glabrous. Central vein prominent with numerous fine lateral veins, apex obtuse, blunt or with a short oblique point; glands near the base. Inflorescences axillary and twin, or in clusters up to 4 with globular, creamy-yellow flower-heads. Flowering between August and October
Fruit type:
Light brown, narrow-oblong, straight pod to 7 cm long and 5 mm wide, flattish, thin with margins not constricted.
Seed type:
Hard, dark brown reniform seed to 5 mm long and 2.5 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 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
BGA4400 (34.62 g)12+10-Dec-2009DJD1711
South Eastern
Jun-201090%-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.