Seeds of South Australia
Irenepharsus phasmatodes (Cruciferae)
Kangaroo Island Cress
List of species for Irenepharsus
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Seed collecting:
November to March
Herbarium region:
Kangaroo Island
NRM region:
Kangaroo Island
IBRA region
Kangaroo Island (KAN01)Kanmantoo
 Near Threatened   [abundant after fire, fluctuates, restricted to west end; could be Rare]
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 Irenepharsus]
Name derivation:
Irenepharsus from the Greek 'irene' meaning peace and 'pharsos' meaning a piece; referring to the resolution of a taxonomic problem. Phasmatodes possibly from the Greek 'phasm' meaning phantom; referring to the cryptic nature of the species, appearing only after fire.
Distribution:
Endemic to South Australia and found only on the western end of Kangaroo Island, growing on laterite soil.
Status:
Native. Rare in South Australia. More common post fire.
Plant description:
Erect annual or biennial, sparingly branched herb to 90 cm tall, stems glabrous. Basal leaves rosette and pinnate, persisting. Stem leaves sparse, to 6 cm long, linear, entire. Flowers along a short spike with large white flower. Flowering between November and February.
Fruit type:
Brown cylindrical pod to 22 mm long and 1.5 mm wide.
Seed type:
Dark brown reinform seed to 1.2 mm long and 0.7 mm wide, with small net-like surface.
Embryo type:
Bent.
Seed collecting:
Collect maturing pods those turning pale brown with hard 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 two 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
BGA 
MSB
7700 (1.48 g)
6800 (1.3 g)
100+11-Nov-2008TST571
Kangaroo Island
20-Jul-200985%-18°C
BGA8000 (1.55 g)25+15-Dec-2008MJT218
Kangaroo Island
20-Jul-2009100%+5°C, -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.