Seeds of South Australia
Dillwynia sericea (Leguminosae)
Showy Parrot-pea
List of species for Dillwynia
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Seed collecting:
December to February
Herbarium regions:
Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, South Australian Murray-Darling Basin, South East
IBRA regions
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(ii))
Lucindale (NCP03) 
 Least Concern
Tintinara (NCP04) 
 Least Concern
Kangaroo Island (KAN01)Kanmantoo
 Least Concern
Fleurieu (KAN02) 
 Near Threatened
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [limited habitat, needs deep sand; habitat quality declining]
Southern Yorke (EYB01)Eyre Yorke Block
 Endangered   (IUCN: EN B2ab(iii))   (Probable Decline)   [limited habitat, threatened by salinity, small pop.]
St Vincent (EYB02) 
 Regionally Extinct
Eyre Hills (EYB03) 
 Endangered   (IUCN: EN B2ab(iii))   [Caralue Bluff, need to monitor, some doubt about ID]
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Lowan Mallee (MDD04) 
 Least Concern
Wimmera (MDD05) 
 Rare   (IUCN: RA d(ii))   [edge of range]
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 Dillwynia]
Name derivation:
Dillwynia named after Lewis Weston Dillwyn (1778-1855), a British porcelain manufacturer, naturalist and Member of Parliament. Sericea from Latin meaning silky; alluding to the silky hairs on the stems.
Distribution:
Found on Kangaroo Island, southern Mount Lofty Ranges and the South-east in South Australia, in heathland, woodland and dry sclerophyll forest. Also found in Queensland, New South Wales, Victoria and Tasmania.
Status:
Native. Common in South Australia. Rare in Queensland. Common in the other states.
Plant description:
Erect to procumbent shrub, to 1 m tall, stems densely covered with spreading or appressed hairs, particularly the younger branches. Leaves linear, to 20 mm long and 1 mm wide, moderately crowded, smooth or tuberculate, glabrous or with long hairs, apex usually shortly acuminate. Flowers mostly paired (sometimes single) in leaf-axils, often forming dense, leafy flower-spike with apricot-coloured with a red centre (rarely clear yellow) pea-flowers. Flowering between August and December.
Fruit type:
Brown ovoid pod to 5 mm long and 3.5 mm wide, with white hairs.
Seed type:
Dark brown reniform seed to 2.5 mm long and 1.5 mm wide, with a wrinkled surafce and a crean aril.
Embryo type:
Bent.
Seed collecting:
Collect mature pods that are brown or turning brown. It should contain a black hard seeds.
Seed cleaning:
Place the pods in a paper bag and leave to dry for at lease a week. Then rub the seed pods to dislodge the seeds. Use a sieve to separate the seeds from unwanted material.
Seed viability:
From one collection, the seed viability was high, at 84%.
Seed germination:
This species has physiological 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
BGA1180 (1.66 g)20+4-Dec-2012DJD2596
South Eastern
27-Feb-2014 (Xray 84%)-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 201388%12d12d Seed coat nicked with scalpel blade
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)