Seeds of South Australia
Isolepis congrua (Cyperaceae)
Slender Club-sedge
List of species for Isolepis
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Seed collecting:
September to December
Herbarium regions:
North Western, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands, South East
IBRA regions
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(i,ii))
Fleurieu (KAN02)Kanmantoo
 Rare   (IUCN: RA d(ii))   [brought in by birds & via water]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))   [brought in by birds & via water]
Broughton (FLB02) 
 Endangered   (IUCN: EN D)   (Probable Decline)
Olary Spur (FLB03) 
 Rare   (IUCN: RA b)   (Definite Decline)
Southern Flinders (FLB04) 
 Rare   (IUCN: RA b)   (Probable Decline)
Northern Flinders (FLB05) 
 Rare   (IUCN: RA d(i,ii))   [winter rainfall sp.; probably declining]
Central Flinders (FLB06) 
 Rare   (IUCN: RA d(i,ii))   [winter rainfall sp.; probably declining]
St Vincent (EYB02)Eyre Yorke Block
 Endangered   (IUCN: EN D)   (Probable Decline)
Eyre Hills (EYB03) 
 Rare   (IUCN: RA d(ii))
Talia (EYB04) 
 Rare   (IUCN: RA d(ii))
Eyre Mallee (EYB05) 
 Rare   (IUCN: RA d(ii))
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(ii))
Gawler Volcanics (GAW02) 
 Rare   (IUCN: RA d(ii))
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(ii))
Bimbowrie (BHC05)Broken Hill Complex
 Rare   (IUCN: RA b)   (Definite Decline)
Mann-Musgrave Block (CER01)Central Ranges
 Rare   (IUCN: RA d(i,ii))
Watarru (CER02) 
 Rare   (IUCN: RA d(i,ii))   [localised]
Everard Block (CER03) 
 Near Threatened
IBRA regions
Glenelg Plain (NCP02)Naracoorte Coastal PlainRare
  (IUCN: RA d(i,ii))
Fleurieu (KAN02)KanmantooRare
  (IUCN: RA d(ii))   [brought in by birds & via water]
6 of 6 subregionsFlinders Lofty BlockRare
, Endangered
4 of 5 subregionsEyre Yorke BlockRare
, Endangered
3 of 8 subregionsGawlerRare
Bimbowrie (BHC05)Broken Hill ComplexRare
  (IUCN: RA b)   (Definite Decline)
3 of 3 subregionsCentral RangesNear Threatened
, 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 Isolepis]
Name derivation:
Isolepis from the Greek 'isos' meaning equal and 'lepis' meaning scale; referring to the glumes. Congrua from the Latin 'congruus' meaning agreeable.
Found scattered in the central and north-western parts of South Australia, growing in seasonally wet sandy areas. Also found in Western Australia, Northern Territory, New South Wales and Victoria.
Native. Rare in South Australia. Rare in the Northern Territory and Victoria. Common in the other states.
Plant description:
Very slender annual sedge to 5 cm, stems solitary or tufted, capillary. Leaf blades about as wide as the stems, to 2 cm long or reduced to a point, bract suberect or spreading, to 10 mm long, glume-like at the base. Spikelets up to 4 but usually 2 or 3, pallid or pale-brown, oblong or ovoid, very obtuse, angular, mostly 3-4 mm long, rather few-flowered, glumes not densely packed, to 1.5 mm long, the stout green keel running out into an acute erect or spreading point, the sides very thin but firm, nerveless, hyaline or stained with brown. Flowering July to October. Isolepis congrua is diagnosed by the acute hyaline glumes with sides more than 0.4 mm wide.
Fruit type:
Brown long ovoid fruit-head in clusters at the end of stems.
Seed type:
Pale brown ovoid-triangular seed to 0.6 mm long and 0.4 mm wide with a squarish mesh-liked 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.