Seeds of South Australia
Acacia menzelii (Leguminosae)
Tallebung Wattle
List of species for Acacia
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Seed collecting:
November to December
Herbarium regions:
Flinders Ranges, Murray
NRM regions:
Northern and Yorke, South Australian Murray-Darling Basin
IBRA regions
Fleurieu (KAN02)Kanmantoo
 Rare   (IUCN: RA d(ii))   [endemic to SA; habitat specific; needs good soil; easy to propagate, used in reveg; limited distribution]
Northern Flinders (FLB05)Flinders Lofty Block
 Endangered   (IUCN: EN D)   [very few plants]
Central Flinders (FLB06) 
 Vulnerable   (IUCN: VU D1+2)   [in Brachinna Gorge; could be Endangered]
Murray Mallee (MDD02)Murray Darling Depression
 Vulnerable   (IUCN: VU C1)   (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 arabicaMenzelii named in honour of O. E. Menzel, a botanical collector, who first collected this species in flower in 1897, at Monarto, South Australia.
Distribution:
Endemic to South Australia and found in a small area in the Murray region near Monarto and in the Flinders Ranges. Occurs in open scrub, often associated with Eucalyptus socialis and E. incrassata, on grey-brown calcareous loamy soils.
Status:
Native. Very rare in South Australia.
Plant description:
Erect, compact, rounded spreading shrubs to 2 m high, branching near ground level into a number of ascending stems. Leaves terete or subterete to 3.5 cm long and approximately 1 mm wide. Inflorescences simple and axillary, solitary or twin with globular, bright yellow flower-heads. Flowering from July to October.
Fruit type:
Brown linear pod to 14.5 cm long and 3 mm wide; curved or slightly twisted; biconvex, contracted and acute at both ends with  yellowish vein-like margins constricted between seeds.
Seed type:
Hard black ellipsoid seed to 5 mm along and 2 mm wide with a large fleshy, whitish aril.
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 six collections, the seed viability was high, ranging from 70% to 100%.
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
1289 (4.67 g)
ns
5217-Dec-2003PJA69
Southern Lofty
23-Mar-200675%-18°C
BGA 
MSB
651 (1.7 g)
ns
4317-Dec-2003PJA66
Southern Lofty
23-Mar-200670%-18°C
BGA 
MSB
5500 (51.6 g)
5500 (51.6 g)
250+15-Dec-2005PJA111
Murray
1-Aug-200685%+5°C, -18°C
BGA7900 (63.33 g)8-Dec-2005CO4
Murray
1-Aug-200675%-18°C
BGA 
MSB
8000 (61.07 g)
8000 (61.07 g)
50+15-Dec-2005PJA112
Murray
1-Aug-2006100%+5°C, -18°C
BGA3000 (13.16 g)100+8-Dec-2009KHB334
Flinders Ranges
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.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
April 2010100%7d14d None
70mm glass petri dishes on 1% w/v agar
12/12 dark/light  /  20C constant
April 201098%7d14d None
70mm glass petri dishes on 1% w/v agar
Incubated under spring/autumn conditions
April 201098%7d14d None
70mm glass petri dishes on 1% w/v agar
Incubated under winter conditions
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)