Seeds of South Australia
Cardamine paucijuga (Cruciferae)
Annual Bitter-cress
List of species for Cardamine
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Seed collecting:
September to December
Herbarium regions:
Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, South East
IBRA regions
Kangaroo Island (KAN01)Kanmantoo
 Rare   (IUCN: RA d(i,ii))   [western end of KI]
Fleurieu (KAN02) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)   [restricted area; habitat under threat by weeds]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)   [restricted area; habitat under threat by weeds]
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 Cardamine]
Name derivation:
Cardamine from the Greek 'kardamon' a name given by Dioscorides for a species of cress, an Indian spice and derived from the Greek 'cardia' meaning heart and 'damaein' meaning to blind; alluding to the reputed heart-strengthening effects of the plant. Paucijuga means few leaflets.
Distribution:
Found on Kangaroo Island, southern Mount Lofty Ranges and the lower South-east in South Australia, growing in rich soils in moist to dry habitats. Also found in Western Australia, Queensland, New South Wales and Victoria.
Status:
Native. Rare in South Australia. Rare in Western Australia, Queensland and Victoria. Common in New South Wales.
Plant description:
Annual herb to 40 cm long, glabrous, taproot persisting, commonly also with fibrous roots with stems slender, erect or trailing. Leaves thin. Basal leaves with long petiolate, pinnate, rosetted, to 12 cm long, terminal leaflet with cordate base, lateral leaflets petiolulate. Stem leaves several, to 12 cm long, pinnate with 1–3 pairs of lateral pinnae, often long, pinnae oblong-elliptic to fusiform, mostly entire. Flower spike few to many pink or white flowers. Flowering between June and November.
Fruit type:
Long pale brown pods to 3 cm in length, splitting into two.
Seed type:
Small orang-brown flat reniform seeds to 1 mm long and 1 mm wide.
Embryo type:
Bent.
Seed collecting:
Collect maturing pods those turning pale brown with orange seeds inside. Be gentle with the pods as they split open easily.
Seed cleaning:
Place the pods in a tray and cover with paper to prevent seeds from popping out and leave to dry for a week. Then rub the dried pods gently by hand 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 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
BGA6000 (1.01 g)5020-Sep-2007RJB74297
Southern Lofty
19-Sep-200885%+5°C, -18°C
BGA6600 (1.05 g)50+8-Oct-2008DJD1241
Kangaroo Island
20-Jul-2009100%-18°C
BGA1000 (0.27 g)25+11-Nov-2008TST594
Kangaroo Island
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.