Seeds of South Australia
Arabidella eremigena (Cruciferae)
Priddiwalkatji
List of species for Arabidella
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Seed collecting:
August to October
Herbarium regions:
Lake Eyre, Murray
NRM regions:
South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
Murray Scroll Belt (RIV06)Riverina
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)
Dieri (SSD03)Simpson Strzelecki Dunefields
 Least Concern
Strzelecki Desert (SSD05) 
 Least Concern   [comes and goes]
Murnpeowie (STP03)Stony Plains
 Rare   (IUCN: RA d(i,ii))
Sturt Stony Desert (CHC02)Channel Country
 Least Concern
Diamantina-Eyre (CHC04) 
 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 Arabidella]
Name derivation:
Arabidella is a diminutive of 'arabis' which is a Greek word for mustard or cress. Eremigena from the Greek 'eremites' meaning of the desert and 'genia' meaning born, referring to the species habitat.
Distribution:
Found in the north-east part of South Australia with isolated collections from Chowilla along the Murray River, growing on sandy loam soil in floodplain and wet depressions. Also found in Queensland and New South Wales.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:

Prostrate or erect herb to 40 cm tall, with many hairy stems. Basal leaves pinnate  with 4-5 lobes to 6 cm long; stem leaves pinnate with 1-4 pairs of lobes, reducing towards the tip. Flower-spike dense terminal cluster with white or yellow, rarely lavender flowers. Flowering between July and September.

Fruit type:
Long brown narrow pods.
Seed type:
Tiny yellow semi-flat seeds to  0.7 mm long and 0.4 mm wide.
Embryo type:
Bent.
Seed collecting:
Collect pods that are maturing, drying and turning brown, with yellow seeds inside.
Seed cleaning:
Place the pods in a tray and cover with paper to prevent seeds popping out and leave to dry for a week. Then rub the pods with your hands 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 physiological dormancy that need to be overcome for the seed to germinate.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA26100 (1.54 g)9-Sep-2008DJD1086
Eastern
20-Jul-2009100%-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.