Seeds of South Australia
Swainsona adenophylla (Leguminosae)
Violet Swainson-pea
List of species for Swainsona
Display more images
Click on an image to enlarge it
Seed collecting:
September to November
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Flinders Ranges
NRM region:
South Australian Arid Lands
IBRA regions
SUMMARY
Northern Flinders (FLB05)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   [edge of salt lakes]
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Gawler Lakes (GAW03) 
 Least Concern
Arcoona Plateau (GAW04) 
 Least Concern
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Torrens (GAW06) 
 Near Threatened   [edge of salt lakes]
Roxby (GAW07) 
 Near Threatened   [edge of salt lakes]
Tallaringa (GVD05)Great Victoria Desert
 Rare   (IUCN: RA d(i,ii))   [edge of salt lakes]
Dieri (SSD03)Simpson Strzelecki Dunefields
 Near Threatened   [edge of salt lakes]
Warriner (SSD04) 
 Rare   (IUCN: RA d(ii))   [edge of salt lakes]
Strzelecki Desert (SSD05) 
 Rare   (IUCN: RA d(ii))   [edge of salt lakes]
Murnpeowie (STP03)Stony Plains
 Least Concern   [edge of salt lakes]
Peake-Dennison Inlier (STP04) 
 Rare   (IUCN: RA d(i,ii))   [edge of salt lakes]
Baltana (STP07) 
 Least Concern   [edge of salt lakes]
Pedirka (FIN04)Finke
 Rare   (IUCN: RA d(i,ii))   [edge of salt lakes]
IBRA regions
DISPLAY ALL
Northern Flinders (FLB05)Flinders Lofty BlockRare
  (IUCN: RA d(ii))   [edge of salt lakes]
6 of 8 subregionsGawlerLeast Concern
, Near Threatened
, Rare
Tallaringa (GVD05)Great Victoria DesertRare
  (IUCN: RA d(i,ii))   [edge of salt lakes]
3 of 4 subregionsSimpson Strzelecki DunefieldsNear Threatened
, Rare
3 of 7 subregionsStony PlainsLeast Concern
, Rare
Pedirka (FIN04)FinkeRare
  (IUCN: RA d(i,ii))   [edge of salt lakes]
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. Adenophylla  from the Greek 'aden' meaning gland and 'phyllon' meaning leaf; referring to its glandular leaves.
Distribution:
Found usually on red, sandy soil and occasionally stony flats in the arid region of South Australia. Also found in New South Wales and Victoria.
Status:
Native. Common in South Australia. Rare in the other States.
Plant description:
An erect or spreading perennial to 30cm high with numerous hairy stems from a taproot. Leaves mostly 3-8 cm long with 3-9 hairy, narrow-linear leaflets. Flowers purple occasionally pink. 
Fruit type:
Paper pods to 20mm long.
Seed type:
Dark brown to orange and sometime mottled, semi-flat reniform seeds to 5 mm long with a wrinkled surface.
Embryo type:
Bent.
Seed collecting:
Collect mature pods, those with hard seeds inside. Mature pods can be found lying on the ground next to the plant.
Seed cleaning:
Place the pods in a tray and leave to dry for 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 two collections, the seed viability were high, ranging from 85% to 90%.
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
BGA 
MSB
5850 (18.92 g)
3000 (9.6 g)
30-4025-Sep-2007DJD849
Lake Eyre
19-Sep-200885%-18°C
BGA7400 (19.58 g)30+1-Nov-2010MJT277
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.