Seeds of South Australia
Isolepis marginata (Cyperaceae)
Coarse Club-rush
List of species for Isolepis
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Seed collecting:
October to March
Herbarium regions:
Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
IBRA regions
Broughton (FLB02)Flinders Lofty Block
 Least Concern   (Probable Decline)
Southern Flinders (FLB04) 
 Least Concern   (Probable Decline)
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern   (Probable Decline)
St Vincent (EYB02) 
 Least Concern   (Probable Decline)
Bimbowrie (BHC05)Broken Hill Complex
 Rare   (IUCN: RA bd(ii))   (Definite Decline)   [On one hillside]
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 Isolepis]
Name derivation:
Isolepis from the Greek 'isos' meaning equal and 'lepis' meaning scale; referring to the glumes. Marginata from the Latin 'marginatus' meaning enclosed with a border.
Found across the southern part of South Australia, growing in damp places. Also found in Western Australia, New South Wales, Victoria and Tasmania.
Introduced to South Australia, Western Australia, New South Wales and part of Victoria. Native in Tasmania and part of Victoria.
Plant description:
Small tufted annual sedge, to 8 cm, sometimes to 2 cm high. Stems setaceous, leaves usually well-developed, setaceous, shorter than the stems, bract 1, erect or spreading, longer than the spikelets. Spikelets 1-6 in a single cluster, ovoid or oblong, prominently angular, to 4 mm long, few-flowered, glumes boat-shaped, to 2 mm long, incurved, rigid, keel unusually stout, green, the sides shining, each with 4-6 curved nerves and a bright-brown or purplish-brown patch. Flowering between September and January.
Fruit type:
Few brown ovoid fruit-head in clusters at the end of stems.
Seed type:
Light brown ovoid-triangular seed to 0.8 mm long and 0.8 mm wide with a smooth surface.
Embryo type:
Seed collecting:
Collect fruits either by picking off the mature heads, those turning brown and come-off easily or pull out the whole plant.
Seed cleaning:
Place the heads in a tray and leave to dry for one to two weeks. Then rub the heads with a rubber bung to dislodge the seeds. Use a sieve to separate any unwanted material. Be careful, as the seeds are very small. Seeds are brown and hard. 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.