Seeds of South Australia
Cyperus centralis (Cyperaceae)
Central Fat-sedge
List of species for Cyperus
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Herbarium regions:
North Western, Lake Eyre
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands
IBRA regions
Kintore (GVD04)Great Victoria Desert
 Rare   (IUCN: RA d(i,ii))
Breakaways (STP01)Stony Plains
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Oodnadatta (STP02) 
 Rare   (IUCN: RA d(i,ii))
Macumba (STP05) 
 Rare   (IUCN: RA d(i,ii))
Baltana (STP07) 
 Rare   (IUCN: RA d(ii))
Mann-Musgrave Block (CER01)Central Ranges
 Near Threatened
Watarru (CER02) 
 Near Threatened
Everard Block (CER03) 
 Near Threatened
Tieyon (FIN03)Finke
 Rare   (IUCN: RA d(i,ii))
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. Centralis from Latin meaning middle or central; referring to the species' occurrence in the geographical centre of Australia.
Distribution:
Found in the north-west corner of South Australia, growing on sand in rocky gorges, rockholes, gullies, stream banks and beds. Also found in Western Australia and the Northern Territory.
Status:
Native. Uncommon in South Australia. Common in the other states.
Plant description:
Tall but slender perenniall sedge, tufted, often with rather long surculi and a thickened somewhat bulbous base, to 110 cm high, not viscid. Stems trigonous to triquetrous, often slightly scabrous, to 2.5 mm diameter. Leaves flat to carinate or canaliculate, usually not septate-nodulose, shorter than the stems, to 3.5 mm wide, usually smooth, leaf sheaths usually not septate-nodulose, finely striate, not shining, stramineous above, purple-red below. Inflorescence simple or small-compound, 4-12 primary branches to 10 cm long, spikelets about 12 in loose hemispherical clusters, compressed, oblong to narrow-ovate, to 18 mm long and 3 mm wide in side view, 4-18 flowers.
Fruit type:
Reddish-brown globular fruit clusters.
Embryo type:
Capitate.
Seed collecting:
Collect fruits either by picking off the mature heads, those turning brown and come-off easily or break-off whole spikes.
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 yellowish 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.