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:
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 'cyperos' , 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.
Found only in one area at Pomanda Point in South Australia growing on the margin flats of Lake Alexandrina. Also found in Queensland, New South Wales and Victoria.
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 tips 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:
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)
of plants
Collection number
Collection location
% ViabilityStorage
2200 (0.5 g)
1500 (0.32 g)
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.