Flat-fruit Club-sedge,
Flat-fruit Club-rush
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Regional Species Conservation Assessments per IBRA subregion.
Least concern
Near threatened
Rare
Vulnerable
Endangered
Critically endangered
Extinct
Data deficient
Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
Display IBRA region text
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)) (Probable Decline) |
Lucindale (NCP03) | | Rare (IUCN: RA d(ii)) (Probable Decline) |
Tintinara (NCP04) | | Rare (IUCN: RA d(i,ii)) (Probable Decline) |
Kangaroo Island (KAN01) | Kanmantoo | Near Threatened [undercollected] |
Fleurieu (KAN02) | | Near Threatened [perennial] |
Mount Lofty Ranges (FLB01) | Flinders Lofty Block | Near Threatened [perennial] |
Broughton (FLB02) | | Least Concern |
Southern Flinders (FLB04) | | Rare (IUCN: RA d(ii)) |
Central Flinders (FLB06) | | Rare (IUCN: RA d(ii)) (Probable Decline) [climate sensitive; perennial; around springs] |
Southern Yorke (EYB01) | Eyre Yorke Block | Least Concern |
St Vincent (EYB02) | | Endangered (IUCN: EN D) (Definite Decline) |
Eyre Hills (EYB03) | | Vulnerable (IUCN: VU B2ab(i,ii,iii)) (Probable Decline) |
Eyre Mallee (EYB05) | | Vulnerable (IUCN: VU B2ab(i,ii,iii)) (Probable Decline) |
Lowan Mallee (MDD04) | Murray Darling Depression | Rare (IUCN: RA d(ii)) |
Wimmera (MDD05) | | Rare (IUCN: RA d(i,ii)) [edge of range] |
Gawler Volcanics (GAW02) | Gawler | Vulnerable (IUCN: VU B2ab(i,ii,iii)) (Probable Decline) |
Mount Gambier (SVP02) | Southern Volcanic Plain | Rare (IUCN: RA d(i,ii)) |
4 of 4 subregions | Naracoorte Coastal Plain | Rare |
2 of 2 subregions | Kanmantoo | Near Threatened |
4 of 6 subregions | Flinders Lofty Block | Least Concern , Near Threatened , Rare |
4 of 5 subregions | Eyre Yorke Block | Least Concern , Vulnerable , Endangered |
2 of 6 subregions | Murray Darling Depression | Rare |
Gawler Volcanics (GAW02) | Gawler | Vulnerable (IUCN: VU B2ab(i,ii,iii)) (Probable Decline) |
Botanical art
Kath Alcock paintings: 3
Prior names
Scirpus platycarpus
Common names
Flat-fruit Club-sedge
Flat-fruit Club-rush
Etymology
Isolepis, from the Greek 'isos' meaning equal and 'lepis', meaning scale, referring to the glumes. Platycarpa, from the Greek 'platys', meaning broad and flat and 'karpos', meaning fruit.
Distribution and status
Found in the southern part of South Australia growing in moist areas. Also found in New South Wales, Victoria and Tasmania. Native. Common in South Australia. Common in the other States.
Herbarium regions: Flinders Ranges, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern, Green Adelaide
AVH map: SA distribution map (external link)
Plant description
Small tufted annual sedge to 8 cm high. Stems setaceous; leaf blades to 3 cm long and setaceous, sometimes absent; bract sometimes longer than the cluster; similar to the leaves, to 5 mm long. Spikelets 1 or 2, often solitary; ovoid-ellipsoid, to 3.5 mm long, (similar to those of I. hookeriana but rather broader and less distinctly angled); glumes to 1.5 mm long, with spreading points, the sides somewhat opaque. Flowering between September and April. Fruits are brown fruit-head with 1-2 spikelets in clusters at the end of stems. Seeds are brown globular seed to 0.9 mm long and 0.6 mm wide, with a low and small ovoid mesh-liked surface. Seed embryo type is capitate.
Seed collection and propagation
Collect seeds between September and May. Collect fruits by picking off the mature heads; those turning brown and that come-off easily. 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 brown 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. From one collection, the seed viability was high, at 95%.
Location | No. of seeds (weight grams) | Number of plants | Date collected | Collection number Collection location | Date stored | % Viability | Storage temperature | BGA | 4,800 (0.61 g) | 500 | 2-Oct-2007 | RJB75084 South Eastern | 19-Sep-2008 | 95% | -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.