Seeds of South Australia
Isolepis inundata (Cyperaceae)
Swamp Club-rush
List of species for Isolepis
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Seed collecting:
September, November to June
Herbarium regions:
Flinders Ranges, Eyre Peninsula, Northern Lofty, Murray, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Rare   (IUCN: RA d(i,ii))
Bridgewater (NCP01)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Glenelg Plain (NCP02) 
 Rare   (IUCN: RA d(ii))
Lucindale (NCP03) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Kangaroo Island (KAN01)Kanmantoo
 Near Threatened   [n water courses]
Fleurieu (KAN02) 
 Least Concern
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Least Concern
Southern Flinders (FLB04) 
 Rare   (IUCN: RA b)   (Definite Decline)
Central Flinders (FLB06) 
 Vulnerable   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [localised in Wilpena]
Eyre Hills (EYB03)Eyre Yorke Block
 Regionally Extinct
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Murray Lakes and Coorong (MDD03) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)
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 Isolepis]
Name derivation:
Isolepis from the Greek 'isos' meaning equal and 'lepis' meaning scale; referring to the glumes. Inundata from the Latin 'inundo' meaning flooded; referring to the species tolerance for growing in boggy or wet areas.
Distribution:
Found in the southern part of South Australia, growing in creeks, swamps and seasonally wet depressions. Also found in all states except the Northern Territory.
Status:
Native. Uncommon in South Australia. Rare in Western Australia. Common in the other states.
Plant description:
Variable perennial sedge with stems tufted, sometimes coarser than in most species, rigid or flaccid, to 30 cm high, sometimes proliferous. Leaf blades usually reduced to a mere point, sometimes more developed, bract usually longer than the spikelets, erect or oblique. Spikelets mostly 3-12 in a cluster, ovoid to oblong, to 6 mm long, somewhat angled, usually stained with a dark purplish-brown, glumes with a green keel and scarious 3- or 4-nerved sides, slightly mucronate, the tip erect. Flowering between October and April. Isolepis inundata is diagnosed by the reduced leaf blade, proliferating inflorescence and reticulate nutlets.
Fruit type:
Brown ovoid fruit-head in dense clusters at the end of stems.
Seed type:
Yellow ovoid-triangular seed to 0.8 mm long and 0.6 mm wide with fine pitted surface.
Embryo type:
Capitate.
Seed collecting:
Collect fruits by picking off the mature heads, those turning brown 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. Be careful, as the seeds are very small. Seeds are yellow 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.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA8250 (1.65 g)323-Jan-2007RJB70794
Murray
1-Aug-2007100%-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.