Seeds of South Australia
Chorizandra australis (Cyperaceae)
Southern Bristle-sedge
List of species for Chorizandra
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Seed collecting:
December to March
Herbarium region:
South Eastern
NRM region:
South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Endangered   (IUCN: EN D)   [very limited habitat]
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU D2)
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 Chorizandra]
Name derivation:
Chorizandra from the Greek 'chorizo' meaning to separate and 'aner' meaning a male; referring to the male flowers. Australis means of or from the south, or Australia.
Distribution:
Found only in the lower South-east in South Australia, from near Kingston, the Coorong and Glencoe, growing in swamps and around waterholes in still or slow-flowing water. Also found in Tasmania and Victoria.
Status:
Native. Rare in  South Australia. Uncommon in Victoria. Common in Tasmania.
Plant description:
Perennial sedge with a tough rhizome that grows up to 2 m in height. It is yellow-green, hollow stemmed (easily compressed) with longitudinal striations and globular flower heads. Flowers in spring and summer.
Fruit type:
Dense, bristly brown, spherical flower-heads, dark purplish-black when young.
Seed type:
Woody brown ovoid nut to 4 mm long and 2.5 mm wide, with deep striation on the surface.
Embryo type:
Capitate.
Seed collecting:
Collect heads that are brown and come off easily with your fingers.
Seed cleaning:
Place the heads in a tray and leaves to dry for a week. Then rub the heads gently with a rubber bung to dislodge the seed. Use a sieve to separated 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 80%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA12200 (90.19 g)50+13-Dec-2007TST290
South Eastern
19-Sep-200880%+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.