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.
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.
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, 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:
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)
of plants
Collection number
Collection location
% ViabilityStorage
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
Apr-1388%12 d12 d seed coat nicked with scalpel;
1% 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)