Seeds of South Australia
Bolboschoenus medianus (Cyperaceae)
Marsh Club-sedge
List of species for Bolboschoenus
Click on an image to enlarge it
Seed collecting:
November to February
Herbarium regions:
North Western, Murray, Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, South Australian Murray-Darling Basin, South East
IBRA regions
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(i,ii))
Fleurieu (KAN02)Kanmantoo
 Vulnerable   (IUCN: VU D2)   [doesn't tolerate much salinity; in un-natural habitats]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   [doesn't tolerate much salinity; in un-natural habitats]
Broughton (FLB02) 
 Vulnerable   (IUCN: VU D2)
St Vincent (EYB02)Eyre Yorke Block
 Vulnerable   (IUCN: VU D2)
Murray Mallee (MDD02)Murray Darling Depression
 Least Concern   [often confused with B caldweldii]
Murray Lakes and Coorong (MDD03) 
 Rare   (IUCN: RA d(ii))
Murray Scroll Belt (RIV06)Riverina
 Least Concern   [often confused with B caldweldii]
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 Bolboschoenus]
Name derivation:
Bolboschoenus from the Greek 'bolbos' meaning a bulb and 'Schoenus' a genus of Cyperaceae from which it was considered separable by the swellings on the stem.
Distribution:
Found in swamps in the Mount Lofty Ranges and the Murrayland in South Australia, with a few records from the lower South-east. Also found in Western Australia, Queensland, New South Wales, Victoria and Tasmania.
Status:
Native. Uncommon in South Australia. Rare in Western Australia, Queensland and Tasmania. Common in the other states.
Plant description:
Rhizome creeping, woody sedge to 200 cm high bearing hard globose tubers and with three-sided stems. Leaves often to 50 cm long and 11 mm wide, grass-like. Inflorescence umbel-like, with 4-6 rays each with dull, red-brown spikelets.
Fruit type:
Dense golden brown clusters of fruit heads.
Seed type:
Dark brown to black three-sided ovoid nut to 4 mm long and 2 mm wide, with smooth and shiny surface.
Embryo type:
Capitate.
Seed collecting:
Collect whole heads that are brown, containing dark hard seeds.
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 collection, the seed viability was high, at 85%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
15900 (79.6 g)
15900 (79.6 g)
3511-Jan-2007RJB71149
Southern Lofty
1-Aug-200785%-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.