Seeds of South Australia
Cyperus laevigatus (Cyperaceae)
Bore-drain Sedge
List of species for Cyperus
Click on an image to enlarge it
Seed collecting:
January to December
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
IBRA regions
SUMMARY
Bridgewater (NCP01)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU D2)
Fleurieu (KAN02)Kanmantoo
 Rare   (IUCN: RA d(i,ii))   [likes salinity/brackishness]
Broughton (FLB02)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))   [tolerates salt]
Southern Flinders (FLB04) 
 Rare   (IUCN: RA d(i,ii))   [tolerates salt]
Northern Flinders (FLB05) 
 Vulnerable   (IUCN: VU D2)
Central Flinders (FLB06) 
 Vulnerable   (IUCN: VU D2)
St Vincent (EYB02)Eyre Yorke Block
 Rare   (IUCN: RA d(i,ii))   [tolerates salt]
Talia (EYB04) 
 Rare   (IUCN: RA d(ii))   [tolerant to salt]
Murray Lakes and Coorong (MDD03)Murray Darling Depression
 Rare   (IUCN: RA d(ii))
Arcoona Plateau (GAW04)Gawler
 Rare   (IUCN: RA d(ii))   [tough, salt tolerant]
Torrens (GAW06) 
 Vulnerable   (IUCN: VU D2)   [limited habitat]
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Rare   (IUCN: RA d(i,ii))   [Purni Bore]
Dieri (SSD03) 
 Rare   (IUCN: RA d(ii))
Warriner (SSD04) 
 Least Concern   [needs permanent water]
Strzelecki Desert (SSD05) 
 Near Threatened
Breakaways (STP01)Stony Plains
 Rare   (IUCN: RA d(i,ii))   [edge of range, limited habitat]
Oodnadatta (STP02) 
 Near Threatened   [needs permanent water]
Murnpeowie (STP03) 
 Least Concern   [needs permanent water]
Peake-Dennison Inlier (STP04) 
 Near Threatened   [needs permanent water]
Witjira (STP06) 
 Near Threatened   [needs permanent water]
Baltana (STP07) 
 Near Threatened   (Probable Increase)   [needs permanent water]
Sturt Stony Desert (CHC02)Channel Country
 Least Concern   [needs permanent water]
Coongie (CHC06) 
 Rare   (IUCN: RA d(i,ii))   [needs permanent water]
Everard Block (CER03)Central Ranges
 Rare   (IUCN: RA d(i,ii))   [needs permanent water]
IBRA regions
DISPLAY ALL
Bridgewater (NCP01)Naracoorte Coastal PlainVulnerable
  (IUCN: VU D2)
Fleurieu (KAN02)KanmantooRare
  (IUCN: RA d(i,ii))   [likes salinity/brackishness]
4 of 6 subregionsFlinders Lofty BlockRare
, Vulnerable
2 of 5 subregionsEyre Yorke BlockRare
Murray Lakes and Coorong (MDD03)Murray Darling DepressionRare
  (IUCN: RA d(ii))
2 of 8 subregionsGawlerRare
, Vulnerable
4 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
, Near Threatened
, Rare
6 of 7 subregionsStony PlainsLeast Concern
, Near Threatened
, Rare
2 of 4 subregionsChannel CountryLeast Concern
, Rare
Everard Block (CER03)Central RangesRare
  (IUCN: RA d(i,ii))   [needs permanent water]
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 Cyperus]
Name derivation:
Cyperus from the Latin 'cyperos' and derived from the Greek 'kypeiros', an ancient Greek name used by Homer and Theophrastus for several plants of this genus. Laevigatus from Latin meaning smooth, polished; referring to the smooth and shiny stems.
Distribution:
Found in the eastern side of South Australia from the lower South-east to the Queensland border, growing in brackish situations, near seashores and saltmarshes, inland in soakage from artesian bores. Also found in the Northern Territory, Queensland and New South Wales. Introduced to Western Australia.
Status:
Native. Common in South Australia. Uncommon in the northern Territory. Common in the other states.
Plant description:
Perennial sedge with long thick rhizome. Culms tufted or distant, terete or trigonous, smooth, to 60 cm high and 2.5 mm diameter. Leaves reduced to sheaths or the uppermost often with blade to 10 cm long. Inflorescence of 1-16 spikelets, spreading in a single dense apparently lateral sessile head, a deep reddish-brown or purplish to pallid, oblong-lanceolate, turgid, to 20 mm long and 4 mm wide with 12-30-flowers, often curved or twisted. Flowers throughout the year.
Fruit type:
Flat, reddish brown fruit-head in long clusters.
Embryo type:
Capitate.
Seed collecting:
Collect fruits by picking off the mature heads, those turning a brown colour and come-off easily.
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. 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.