Seeds of South Australia
Swainsona canescens (Leguminosae)
Grey swainsona
List of species for Swainsona
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Seed collecting:
November to December
Herbarium regions:
North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eyre Peninsula
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands
IBRA regions
SUMMARY
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [grazing]
Gawler Volcanics (GAW02) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [grazing]
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [grazing]
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [grazing]
Torrens (GAW06) 
 Rare   (IUCN: RA d(ii))   [edge of range]
Roxby (GAW07) 
 Least Concern
Commonwealth Hill (GAW08) 
 Rare   (IUCN: RA d(ii))
Maralinga (GVD03)Great Victoria Desert
 Least Concern
Kintore (GVD04) 
 Least Concern
Tallaringa (GVD05) 
 Least Concern
Yellabinna (GVD06) 
 Rare   (IUCN: RA d(ii))
Breakaways (STP01)Stony Plains
 Rare   (IUCN: RA d(ii))   [limited habitat]
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern
Watarru (CER02) 
 Near Threatened
Tieyon (FIN03)Finke
 Least Concern
IBRA regions
DISPLAY ALL
7 of 8 subregionsGawlerLeast Concern
, Rare
4 of 4 subregionsGreat Victoria DesertLeast Concern
, Rare
Breakaways (STP01)Stony PlainsRare
  (IUCN: RA d(ii))   [limited habitat]
2 of 3 subregionsCentral RangesLeast Concern
, Near Threatened
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.  Canescens is Latin for becoming hoary (white or greyish in colour).
Distribution:
Found in the arid part of South Australia, northwest of Port Augusta. Also occurs in Western Australia and Northern Territory. 
Status:
Common in South Australia. Common interstate.
Plant description:
Erect spreading shrub to 50cm tall with green leaves covered in white hairs. Stems are thick and covered in dense white hairs. Purple, pink or yellow pea-flowers, densely covering an erect stalk and appearing in winter and spring.  
Fruit type:
Dark hairy pods to 25mm long and 6mm wide.
Seed type:
Brown (some with black spots) reniform seeds to 4mm long with a wrinkled surface. 
Embryo type:
Bent.
Seed collecting:
Collect pods that are matured or those drying off with hard brown seeds inside. 
Seed cleaning:
Place the pods in a tray and leave to dry for 1-2 weeks. Then rub the pods with a rubber bung 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 high, ranging from 90% to 100%.
Seed germination:
This species has physical dormancy that need 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
BGA380 (0.685 g)20-Nov-2005BS94-4999
North Western
7-Aug-200690%-18°C
BGA1800 (4.62 g)2-Nov-2009DJD1687
Eyre Peninsula
Jun-2010100%-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.