Seeds of South Australia
Swainsona leeana (Leguminosae)
Lee's Swainson-pea
List of species for Swainsona
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Seed collecting:
September to November
Herbarium regions:
Lake Eyre, Flinders Ranges
NRM region:
South Australian Arid Lands
IBRA region
Northern Flinders (FLB05)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   [outliers; WA spp.]
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. Leeana named in honour of Mrs Alma Lee for her contribution to knowledge of this genus. 
Distribution:
Found in the northern Flinders Ranges in South Australia in dry stony soil or clay-loam in tussock grassland, saltbush and mulga woodland. Also found in Western Australia.
Status:
Native. Rare in South Australia. Common in Western Australia.
Plant description:
A small prostrate annual or perennial to 10cm high with numerous hairy stems arising from a taproot. Leaves 1-3cm long with 5-7 hairy, obovate or elliptic leaflets. Flowers purple or yellow.
Fruit type:
Small hairy papery pod 8-10mm long.
Seed type:
Brown, semi-flat reniform seeds to 1.5mm long with a wrinkled surface.
Embryo type:
Bent.
Seed collecting:
Collect mature pods those turning reddish brown and contain hard seeds. 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 three collections, the seed viability were high, ranging from 85% 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
BGA4800 (7.18 g)100+17-Jun-2010KHB433
Flinders Ranges
1-Jan-201285%-18°C
BGA 
MSB
3500 (6.22 g)
3500 (6.22 g)
50+11-Oct-2010TST1070
Flinders Ranges
1-Jan-201295%-18°C
BGA1100 (1.97 g)1011-Oct-2010DJD1973
Flinders Ranges
1-Jan-2012100%-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.