Seeds of South Australia
Swainsona microcalyx (Leguminosae)
Wild Violet
List of species for Swainsona
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Seed collecting:
October to November
Herbarium regions:
Gairdner-Torrens, Eyre Peninsula
NRM regions:
Eyre Peninsula, South Australian Arid Lands
IBRA regions
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [grazed]
Gawler Volcanics (GAW02) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [grazed]
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [grazed]
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [grazed]
Roxby (GAW07) 
 Near Threatened
Commonwealth Hill (GAW08) 
 Rare   (IUCN: RA d(i,ii))
Yellabinna (GVD06)Great Victoria Desert
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [grazed]
Dieri (SSD03)Simpson Strzelecki Dunefields
 Least Concern
Everard Block (CER03)Central Ranges
 Rare   (IUCN: RA d(i,ii))
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. Microcalyx from the Greek 'micros' meaning small and 'calyx' meaning cover or cup; referring to the relatively small calyx of the species.
Distribution:
Found in an area north of Eyre Peninsula in South Australia usually on flat, sandy margins of salt lakes with ephemeral herbs. Also found in Western Australia.
Status:
Native. Common in South Australia. Common in Western Australia.
Plant description:
A prostrate or low-growing perennial with numerous smooth stems arising from a taproot. Leaves usually 2-6cm long with 5-9 pubescent leaflets. Flowers purple.
Fruit type:
Cylindrical-oblong pod to 20mm long and 4mm wides, tapered at both ends with scattered appressed hairs.
Seed type:
Light brown semi-flat reinform seed to 3mm 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 for a week. When dried the pods can become hard and difficult to open. 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 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
BGA10000 (27.42 g)2-Nov-2009DJD1585
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.