Seeds of South Australia
Dodonaea viscosa ssp. cuneata (Sapindaceae)
Wedge-leaf Hop-bush
List of species for Dodonaea
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Seed collecting:
November to March
Herbarium regions:
Northern Lofty, Murray, Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, South Australian Murray-Darling Basin, South East
IBRA regions
Lucindale (NCP03)Naracoorte Coastal Plain
 Endangered   (IUCN: EN D)   [restricted to 1 granite outcrop]
Tintinara (NCP04) 
 Vulnerable   (IUCN: VU D2)   [restricted to granite]
Fleurieu (KAN02)Kanmantoo
 Rare   (IUCN: RA d(ii))   [edge of range]
Broughton (FLB02)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))
Talia (EYB04)Eyre Yorke Block
 Rare   (IUCN: RA d(i,ii))   [no records]
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(i))
Murray Lakes and Coorong (MDD03) 
 Rare   (IUCN: RA d(ii))
Lowan Mallee (MDD04) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
Gawler Volcanics (GAW02)Gawler
 Rare   (IUCN: RA d(i,ii))
Kingoonya (GAW05) 
 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 Dodonaea]
Name derivation:
Dodonaea named after Rembert Dodoens (1517-1585), a Flemish physician and botanist, also known under his Latinized name Rembertus Dodonaeus. Viscosa from the Latin 'viscosus' meaning sticky; alluding to the leaves being viscous. Cuneata from the Latin 'cuneum' meaning wedge; referring to the wedge-shaped leaves.
Distribution:
Found in the Mount Lofty Ranges and the Murray region of South Australia, growing in open woodland and mallee shrub communities. Also found in Queensland, New South Wales and Victoria.
Status:
Native. Uncommon in South Australia. Uncommon in Queensland. Common in the other states.
Plant description:
Compact spreading shrub, to 3 m high. Leaves cuneate to angular-obovate or narrow-obovate, truncate or obtuse, usually with a short abrupt point, sometimes irregularly 2-3-toothed at the apex, to 3 cm long and 1 cm wide, margin entire to irregularly sinuolate,. viscous. Flowers in terminal panicles with small yellow-green flowers, sepals 3 or 4, stamens usually 8. Generally, the subspecies are readily distinguishable but many intermediates exist where two or more subspecies are sympatric. This subspecies differ from the other three subspecies found in South Australia by having a wdge-shaped leaves. Flowering between September and January.
Fruit type:
Red-brown 3- or 4-winged capsule to 28 mm long and 28 mm wide, wings extending from the base to the apex of the capsule.
Seed type:
Black globular seed to 3 mm long and 3 mm wide with a short, fat brown aril.
Embryo type:
Folded.
Seed collecting:
Collect winged capsules that contain hard black seeds, usually when capsule is turning red or brown with black seeds.
Seed cleaning:
Place capsules in a tray and leave to dry for 1 to 2 weeks. Then rub the capsules by hand to dislodge the seeds. 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 two collections, the seed viability were average to high, ranging from 55% to 95%.
Seed germination:
This species has physiological dormancy that needs to be overcome for the seed to germinate (e.g. nicking 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
5975
5975
3117-Dec-2003PJA 68
Southern Lofty
1-Sep-200455%+5°C, -18°C
BGA 
MSB
7800 (43.88 g)
7800 (43.88 g)
15+24-Nov-2006TST103
Southern Lofty
1-Aug-200795%-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 200454%11d26d Boiling hot water treatment (Start temperature 90°C) for 10min. Then seed sterilised with 20% Hydrogen Peroxide with 5 drops of Tween (10min). Rinsed in sterile water.
Wet filter paper placed over wettex sponge. Irrigated with RO water
10/14 dark/light  /  10°C/18°C
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)