Seeds of South Australia
Cyperus sphaeroideus (Cyperaceae)
Globe Kyllinga
List of species for Cyperus
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Seed collecting:
December to April
Herbarium region:
Murray
NRM region:
South Australian Murray-Darling Basin
IBRA region
Murray Lakes and Coorong (MDD03)Murray Darling Depression
 Vulnerable   (IUCN: VU D2)
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 'cyperosand derived from the Greek 'kypeiros', an ancient Greek name used by Homer and Theophrastus for several plants of this genus. Sphaeroideus meaning sphere-like; alluding to the shape of the flower.
Distribution:
Found only in one area at Pomanda Point in South Australia, growing on the banks of Lake Alexandrina. Also found in Queensland, New South Wales and Victoria.
Status:
Native. Very rare in south Australia. Common in the other states.
Plant description:
Slender perennial sedge with long slender rhizome. Culms trigonous, smooth, to 50 cm high and 1 mm diameter. Leaves not septate-nodulose, shorter than culms, 2–3 mm wide. Flower-spike head-like, globose, always solitary, 4–7 mm diameter, involucral bracts leaf-like, 2–4 exceeding inflorescence. Spikelets flattened, from very few to 50 per head; glumes short-mucronate, with smooth or slightly toothed keel, with sides several-nerved, whitish to pale brown, often tinged golden, 2–3.5 mm long. Flowers in spring and summer.
Fruit type:
Brown globular fruit-head at terminal of stems.
Seed type:
Brown ovoid seed to 1.3 mm long and 1 mm wide, with a reticulate surface and covered in a thin whitish transparent layer.
Embryo type:
Capitate.
Seed collecting:
Collect fruits by picking off the mature heads, those turning red-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.
Seed viability:
From one collections, 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
BGA 
MSB
2200 (0.5 g)
1500 (0.32 g)
50+16-Jan-2010RLT1222
Murray
Jun-2010100%-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.