Seeds of South Australia
Swainsona villosa (Leguminosae)
Villous Swainson-pea
List of species for Swainsona
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Seed collecting:
September to December
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands
IBRA regions
SUMMARY
Kingoonya (GAW05)Gawler
 Rare   (IUCN: RA d(i,ii))   [southern limit]
Maralinga (GVD03)Great Victoria Desert
 Rare   (IUCN: RA d(i,ii))
Kintore (GVD04) 
 Near Threatened
Tallaringa (GVD05) 
 Rare   (IUCN: RA d(ii))   [edge of range]
Yellabinna (GVD06) 
 Rare   (IUCN: RA d(ii))
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Rare   (IUCN: RA d(ii))   [outlier]
Breakaways (STP01)Stony Plains
 Least Concern
Oodnadatta (STP02) 
 Least Concern
Baltana (STP07) 
 Rare   (IUCN: RA d(i,ii))
Lake Pure (CHC07)Channel Country
 Rare   (IUCN: RA d(ii))   [outliers]
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern
Everard Block (CER03) 
 Least Concern
Tieyon (FIN03)Finke
 Least Concern
IBRA regions
DISPLAY ALL
Kingoonya (GAW05)GawlerRare
  (IUCN: RA d(i,ii))   [southern limit]
4 of 4 subregionsGreat Victoria DesertNear Threatened
, Rare
Simpson Desert (SSD02)Simpson Strzelecki DunefieldsRare
  (IUCN: RA d(ii))   [outlier]
3 of 7 subregionsStony PlainsLeast Concern
, Rare
Lake Pure (CHC07)Channel CountryRare
  (IUCN: RA d(ii))   [outliers]
2 of 3 subregionsCentral RangesLeast Concern
Tieyon (FIN03)FinkeLeast 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. Villisa from the Latin 'villosus' meaning covered with soft hairs; referring to its soft and conspicuous covering of hairs.
Distribution:
Found in red sandy soils in central and north-western South Australia. Also found in Western Australia and Northern Territory.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:
A spreading, usually low growing plant to 20 cm high with numerous dense hairy stems arising from a taproot. Leaves to 8 cm long with 7-15 hairy leaflets. Flowers numerous, purple or occasionally pink or white along a long stalk. Flowering between June and October.
Fruit type:
Stiff, papery bladder/balloon like pod to 15 mm long covered in hairs.
Seed type:
Orange to brown, semi-flat reniform seed to 2 mm long with a wrinkled surface.
Embryo type:
Bent.
Seed collecting:
Collect mature pods. Mature pods can be found lying on the ground next to the plant containing hard seeds.
Seed cleaning:
Place the pods in a tray and leave to dry fro a week. 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 one collection, the seed viability was high, at 90%.
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
6500 (12.35 g)
5600 (10.7 g)
50+4-Oct-2010DJD1931
Lake Eyre
1-Jan-201290%-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.