Seeds of South Australia
Swainsona greyana (Leguminosae)
Hairy Darling pea
List of species for Swainsona
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Seed collecting:
November to March
Herbarium region:
Murray
NRM region:
South Australian Murray-Darling Basin
IBRA regions
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: EN)   (Probable Decline)   [weeds a threat]
Murray Scroll Belt (RIV06)Riverina
 Rare   (IUCN: VU)   [weeds a threat]
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. Greyana named in honour of Sir George Grey (1812-1898) an explorer, governor, politician and keen naturalist.
Distribution:
Found along the River Murray in South Australia. It is limited to the heavy grey soils of the Banks and flats of the lower Murray River and the Darling River and its major tributaries in Queensland, New South Wales and Victoria.
Status:
Native. Common in South Australia. Common in other states.
Plant description:
Shrub-like perennial to 1-2 m high. Leaves 4-16 cm long, with 11-23 woolly, oblong or narrow-oblong leaflets. Flowers white, pink or purple with the keel being apex obtuse and obscurely lipped. Flowering September - March.
Fruit type:
Balloon-like papery pod 25-49mm long and 10-30mm wide, tapered at both ends.
Seed type:
Seed reniform, 1-5 mm, olive-green or brown, fine textured.
Embryo type:
Bent.
Seed collecting:
Collect mature pods that are turning pale brown with hard seeds in side.
Seed cleaning:
Place the pods in a tray and leave to dry for a week. Rub the papery pods with your fingers or 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 three collections, the seed viability were average to high, ranging from 70% 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
BGA138 (1.25 g)5-Dec-2008KHB185
Murray
20-Jul-200970%-18°C
BGA1800 (22.35 g)19-Mar-2009TST724
Murray
20-Jul-200990%-18°C
BGA1800 (22.35 g)19-Mar-2009TST724
Murray
20-Jul-200990%-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.