Seeds of South Australia
Acacia pinguifolia (Leguminosae)
Fat-leaved wattle
List of species for Acacia
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Seed collecting:
November to January
Herbarium regions:
Eyre Peninsula, Southern Lofty
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula
IBRA regions
Fleurieu (KAN02)Kanmantoo
 Endangered   (IUCN: EN D)   [highly localised; needs good soil; limited habitat; disjunct pop; is reveged.]
Eyre Hills (EYB03)Eyre Yorke Block
 Endangered   (IUCN: EN A2c)   (Definite Decline)
Talia (EYB04) 
 Endangered   (IUCN: EN A2c)   (Definite Decline)   [check location accuracy]
Murray Mallee (MDD02)Murray Darling Depression
 Critically Endangered   (IUCN: CR B2ab(i,ii,iii); C1)   (Probable Decline)
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. Pinguifolia from the Latin 'pinguis' meaning fat and 'folium' meaning a leaf; referring to the round fat phyllodes of the species.
Distribution:
Endemic to South Australia and restricted to southern Eyre Peninsula with a small occurrence in the southern Mount Lofty Ranges near Finniss, growing with Eucalyptus odorata, E. incrassata and Melaleuca uncinata in woodland or open scrub, in mainly sandy or hard alkaline yellow duplex soils.
Status:
Native. Very rare in South Australia.
Plant description:
Densely spreading shrub to 2 m high and 3 m wide with long round fleshy leaves. Flowers are contained within a single globular yellow ball on a long stalk, appearing in winter and spring.
Fruit type:
Long curved pods, twisted to 7 cm long, when fully matured and dried.
Seed type:
Semi-flat ovoid dark brown to black seeds to 5 mm long and 3 mm wide.
Embryo type:
Investing.
Seed collecting:
Collect mature pods when turning brown, with dark brown hard seeds. The pods may still be closed.
Seed cleaning:
Place the pods in a tray and leave to dry for 1-2 weeks. Then rub the pods with a rubber bung or by hand to dislodge the seeds from the pods. Use a sieve to separate the 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 seven collections, the seed viability was high, ranging from 80% 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
12500 (125.6 g)
13150 (131.5 g)
60-707-Dec-2004DJD 71
Eyre Peninsula
31-Mar-2006100%-18°C
BGA7420 (72.28 g)516-Nov-2005PJA117
Southern Lofty
1-Aug-200690%-18°C
BGA390 (3.85 g)16-Dec-2005PJA116
Southern Lofty
1-Aug-200685%-18°C
BGA130DJD 7114-Aug-2006-18°C
BGA970 (9.4 g)1222-Dec-2006Brimarvi Road
Southern Lofty
1-Aug-200790%-18°C
BGA2020 (19.68 g)68-Dec-2006CSO8
Southern Lofty
19-Sep-200890%-18°C
BGA1730 (16.31 g)58-Dec-2006CSO7
Southern Lofty
19-Sep-200880%-18°C
BGA240 (2.94 g)38-Dec-2006CSO6
Southern Lofty
19-Sep-2008no test
BGA6800 (58.23 g)1212-Dec-2008DJD1452
Eyre Peninsula
20-Jul-2009100%-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
July 200796%15d28d Stored at -18°C for 1 year and then seed coat nicked.
Wet filter paper placed over wettex sponge.
Incubated under spring/autumn conditions
July 201563%7d7d seed coat nicked
1% water agar
Incubated under spring/autumn conditions
July 20153%14dNA None
1% water agar
Incubated under spring/autumn 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)