Seeds of South Australia
Swainsona phacoides (Leguminosae)
Lilac Darling Pea
List of species for Swainsona
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Seed collecting:
September to November
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Murray
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
SUMMARY
Olary Spur (FLB03)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))
Northern Flinders (FLB05) 
 Least Concern   [sand sp]
Central Flinders (FLB06) 
 Least Concern   [sand sp]
Murray Scroll Belt (RIV06)Riverina
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(ii))   [edge of range]
Gawler Volcanics (GAW02) 
 Rare   (IUCN: RA d(ii))   [edge of range]
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(ii))
Arcoona Plateau (GAW04) 
 Least Concern
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(ii))
Torrens (GAW06) 
 Least Concern   [sand sp]
Roxby (GAW07) 
 Near Threatened   [sand sp]
Commonwealth Hill (GAW08) 
 Near Threatened   [sand sp]
Kintore (GVD04)Great Victoria Desert
 Least Concern
Tallaringa (GVD05) 
 Near Threatened
Yellabinna (GVD06) 
 Rare   (IUCN: RA d(ii))
Barrier Range (BHC01)Broken Hill Complex
 Rare   (IUCN: RA d(ii))
Bimbowrie (BHC05) 
 Rare   (IUCN: RA d(ii))
Curnamona (BHC06) 
 Rare   (IUCN: RA d(ii))
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Least Concern   [sand sp]
Dieri (SSD03) 
 Least Concern   [sand sp]
Warriner (SSD04) 
 Least Concern   [sand sp]
Strzelecki Desert (SSD05) 
 Least Concern   [sand sp]
Oodnadatta (STP02)Stony Plains
 Least Concern
Murnpeowie (STP03) 
 Least Concern   [sand sp]
Peake-Dennison Inlier (STP04) 
 Least Concern
Macumba (STP05) 
 Least Concern
Witjira (STP06) 
 Least Concern
Baltana (STP07) 
 Least Concern   [sand sp]
Sturt Stony Desert (CHC02)Channel Country
 Least Concern   [sand sp]
Diamantina-Eyre (CHC04) 
 Least Concern   [sand sp]
Coongie (CHC06) 
 Least Concern   [sand sp]
Lake Pure (CHC07) 
 Least Concern   [sand sp]
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern
Everard Block (CER03) 
 Near Threatened
Tieyon (FIN03)Finke
 Least Concern
Pedirka (FIN04) 
 Least Concern
IBRA regions
DISPLAY ALL
3 of 6 subregionsFlinders Lofty BlockLeast Concern
, Rare
Murray Scroll Belt (RIV06)RiverinaVulnerable
  (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
8 of 8 subregionsGawlerLeast Concern
, Near Threatened
, Rare
3 of 4 subregionsGreat Victoria DesertLeast Concern
, Near Threatened
, Rare
3 of 4 subregionsBroken Hill ComplexRare
4 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
6 of 7 subregionsStony PlainsLeast Concern
4 of 4 subregionsChannel CountryLeast Concern
2 of 3 subregionsCentral RangesLeast Concern
, Near Threatened
2 of 2 subregionsFinkeLeast Concern
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 Swainsona]
Name derivation:
Swainsona named after Isaac Swainson (1746-1812), an English scientist and horticulturalist who had a private botanic garden near London. Phacoides meaning resemble to the genus Phaca, an old genus of Fabaceae family which is now divided into a number of genera.
Distribution:
Found in a variety of soils, associated with inland dunes and stony soils such as creek beds across much of inland South Australia. Also found in all other mainly states.
Status:
Native. Common in South Australia. Common in other states.
Plant description:
A prostrate or ascending plant with numerous hairy stems arising from a taproot. Leaves variable in length, 5-10mm long with 5-13 long narrow leaflets covered in fine hairs. Flowers purple clustered at the end of a long stalk.
Fruit type:
Dark brown, long pod 15-35mm long covered in dense hairs.
Seed type:
Orange to brown, mottled, semi-flat reniform seeds to 2mm long with a wrinkled surface.
Embryo type:
Bent.
Seed collecting:
Collect mature pods, dark brown containing hard seeds. Mature pods can be found lying on the ground next to the plant containing hard seeds.
Seed cleaning:
When dried the pods become hard and difficult to open. Use a rubber bung to rub the pods or break the pods open with your fingers 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 seven collections, the seed viability were high, ranging from 85% 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
5725 (9.16 g)
5809 (9.3 g)
>10022-Oct-2004MOL 4553
Gairdner-Torrens
31-Mar-200685%-18°C
BGA18100 (30.88 g)50+26-Oct-2007DJD925
Lake Eyre
19-Sep-200895%-18°C
BGA 
MSB
3900 (7.02 g)
3900 (7.02 g)
527-Sep-2007MJT101
Lake Eyre
19-Sep-200885%-18°C
BGA980 (1.67 g)30+30-Sep-2007DJD895
Lake Eyre
19-Sep-2008100%-18°C
BGA 
MSB
8800 (14.09 g)
8800 (14.09 g)
50+25-Sep-2007MJT83
Lake Eyre
19-Sep-2008100%-18°C
BGA 
MSB
21000 (35.98 g)
21000 (35.98 g)
3-Nov-2009DJD1583
Gairdner-Torrens
Jun-201095%-18°C
BGA9500 (16.15 g)25-Nov-2010KHB463
Flinders Ranges
1-Jan-201285%-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.