Seeds of South Australia
Crotalaria smithiana (Leguminosae)
Yellow Rattle-pod
List of species for Crotalaria
Display more images
Click on an image to enlarge it
Seed collecting:
September to December
Herbarium region:
Lake Eyre
NRM region:
South Australian Arid Lands
IBRA regions
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Near Threatened
Dieri (SSD03) 
 Rare   (IUCN: RA d(ii))   [limited habitat]
Strzelecki Desert (SSD05) 
 Near Threatened
Oodnadatta (STP02)Stony Plains
 Rare   (IUCN: RA d(i,ii))
Murnpeowie (STP03) 
 Rare   (IUCN: RA d(ii))   [edge of range]
Macumba (STP05) 
 Near Threatened
Witjira (STP06) 
 Least Concern
Baltana (STP07) 
 Rare   (IUCN: RA d(i,ii))
Sturt Stony Desert (CHC02)Channel Country
 Least Concern
Coongie (CHC06) 
 Least Concern
Lake Pure (CHC07) 
 Least 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 Crotalaria]
Name derivation:
Crotalaria from the Greek 'crotalon' meaning a rattle, castanet; referring to the sound the dried seed pods make when shaken.
Distribution:
Found in the north-east corner of South Australia, growing on sands of hills and creek beds and banks. Also found in Western Australia, Northern Territory, Queensland and New South Wales.
Status:
Native. Common in South Australia. Rare in Western Australia. Uncommon in New South Wales. Common in the other states.
Plant description:
A soft-wooded shrub with a strong tap root, at first an erect stem, later several procumbent or ascending branches to 0.5 m long, grey or bluish-green with a spreading retrorse pilose indumentum. Leaflet elliptic to obovate, often broad, to 50 mm long and 30 mm wide, densely tomentose on both sides, stipules narrow-triangular, pubescent. Flower-spike ascending or erect, terminal on the branches, 3-14 cm long, with up to 40 yellow, often reddish at the centre pea-flowers. Flowering between May and November.
Fruit type:
Reddish-brown obovate-oblong pod to 20 mm long and 9 mm wide.
Seed type:
Orange reinform seed to 4.5 mm long and 3 mm wide with a smooth surface.
Embryo type:
Bent.
Seed collecting:
Collect mature pods, those that are fat, turning reddish-brown and contain hard seeds.
Seed cleaning:
Place the pods in a tray and leave to dry for one to two weeks. Then 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 90%.
Seed germination:
This species has physical dormancy that needs 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
1770 (34 g)
1800 (35 g)
60+26-Sep-2007MJT86
Lake Eyre
19-Sep-200890%-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.