Seeds of South Australia
Cyperus squarrosus (Cyperaceae)
Bearded Flat-sedge
List of species for Cyperus
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Seed collecting:
March to September
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern, Murray
NRM regions:
Alinytjara Wilurara, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
SUMMARY
Olary Spur (FLB03)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Northern Flinders (FLB05) 
 Rare   (IUCN: RA d(i,ii))
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   [could be extinct; outlier]
Murray Scroll Belt (RIV06)Riverina
 Rare   (IUCN: RA d(i,ii))   [arid spp]
Arcoona Plateau (GAW04)Gawler
 Rare   (IUCN: RA d(ii))
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(ii))
Torrens (GAW06) 
 Rare   (IUCN: RA d(ii))
Roxby (GAW07) 
 Least Concern
Commonwealth Hill (GAW08) 
 Rare   (IUCN: RA d(ii))   [edge of range]
Kintore (GVD04)Great Victoria Desert
 Near Threatened
Tallaringa (GVD05) 
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Barrier Range (BHC01)Broken Hill Complex
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Near Threatened
Warriner (SSD04) 
 Least Concern
Strzelecki Desert (SSD05) 
 Least Concern
Breakaways (STP01)Stony Plains
 Near Threatened
Oodnadatta (STP02) 
 Least Concern
Murnpeowie (STP03) 
 Least Concern
Peake-Dennison Inlier (STP04) 
 Near Threatened
Macumba (STP05) 
 Least Concern
Witjira (STP06) 
 Rare   (IUCN: RA d(ii))
Baltana (STP07) 
 Least Concern
Sturt Stony Desert (CHC02)Channel Country
 Least Concern
Coongie (CHC06) 
 Least Concern
Lake Pure (CHC07) 
 Least Concern
Mann-Musgrave Block (CER01)Central Ranges
 Near Threatened
Watarru (CER02) 
 Near Threatened
Tieyon (FIN03)Finke
 Near Threatened
Pedirka (FIN04) 
 Near Threatened
IBRA regions
DISPLAY ALL
2 of 6 subregionsFlinders Lofty BlockRare
Murray Mallee (MDD02)Murray Darling DepressionRare
  (IUCN: RA d(i,ii))   [could be extinct; outlier]
Murray Scroll Belt (RIV06)RiverinaRare
  (IUCN: RA d(i,ii))   [arid spp]
5 of 8 subregionsGawlerLeast Concern
, Rare
2 of 4 subregionsGreat Victoria DesertNear Threatened
, Rare
Barrier Range (BHC01)Broken Hill ComplexRare
  (IUCN: RA d(i,ii))   (Probable Decline)
3 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
, Near Threatened
7 of 7 subregionsStony PlainsLeast Concern
, Near Threatened
, Rare
3 of 4 subregionsChannel CountryLeast Concern
2 of 3 subregionsCentral RangesNear Threatened
2 of 2 subregionsFinkeNear Threatened
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. Squarrosus from the Latin 'squarrosus' meaning having scales or scale-like overlapping leaves or bracts.
Distribution:
Found in the northern part of South Australia, growing in ephemerally wet situations, commonly on sand or alluvium, but is also found in relatively dry habitats. Also found in Western Australia, Northern Territory, Queensland and New South Wales. was recorded in Victoria but now presumed extinct.
Status:
Native. Common in South Australia. Common in the other states. Presumed extinct in Victoria.
Plant description:
Dwarf tufted annual sedge to 15 cm high. Has a strong curry odour when dried. Leaves up to or as long as the stems, to 2 mm wide. Flower-spike a simple umbel. Spikelets usually in dense ovate or oblong-ovate spikes, usually brightly coloured in various shades of brown or yellow. Flowering bewteen March and July.
Fruit type:
Flat, orange-brown fruit-head in dense clusters.
Seed type:
Black ovoid seed to 1 mm long and 0.3 mm wide, with fine tubercules and covered with a thin shiny transparent layer.
Embryo type:
Capitate.
Seed collecting:
Collect fruits either by picking off the mature heads, those turning an orange-brown colour 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 black, ovoid 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.
Seed viability:
From one collection, the seed viability was high, at 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA400000 (10.03 g)200+11-Mar-2007RJB70922
Gairdner-Torrens
19-Sep-2008100%-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.