Seeds of South Australia
Baumea gunnii (Cyperaceae)
Slender Twig-sedge
List of species for Baumea
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Seed collecting:
November to March
Herbarium regions:
Murray, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, South Australian Murray-Darling Basin, South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)
Kangaroo Island (KAN01)Kanmantoo
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [does not tolerate salinity; B Overton has not seen]
Fleurieu (KAN02) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [needs good quality water]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Vulnerable   (IUCN: VU D2)   [highly localised in Mt Lofties; weeds a threat]
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 Baumea]
Name derivation:
Baumea named after Antoine Baume (1728–1804), a French chemist and inventor. Gunnii named after Ronald Campbell Gunn (1808-1881), a British botanist and legislator in Launceston, Tasmania.
Distribution:
Found on Kangaroo Island, southern Mount Lofty Ranges and the lower South-east in South Australia, growing in wet heathlands and swampy woodlands. Also found in Queensland, New South Wales, Victoria and Tasmania.
Status:
Native. Rare in South Australia. Rare in Queensland and Tasmania. Uncommon in the other States.
Plant description:
Slender tufted perennial sedge with very short rhizome. Culms to 100 cm high and 1.5 mm diameter; slender, rigid, terete; nodeless, striate; glabrous or minutely scabrous to smooth. Leaves to 1.5 mm diameter, basal; blade culm-like, as long as to slightly exceeding culm; sheath reddish or straw-coloured (but then usually with reddish tinges);  Inflorescence , interrupted-oblong in outline, narrow, erect, to 60 cm long and 1.5 cm diameter; dull red-brown to grey-brown with spikelets pointing outwards. Flowers in spring and summer.
Fruit type:
Slender red-brown drooping heads.
Embryo type:
Capitate.
Seed collecting:
Collect whole heads that are brown, containing dark hard seeds. Not all heads will contain 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 available.
Seed viability:
From one collection, the seed viability was low, at 20%.
Seed germination:
This species is generally difficult to germinate, it has morphophysiological dormancy and complex germination requirements.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA219 (0.74 g)123-Nov-2007RJB75916
South Eastern
19-Sep-200820%
BGA3009 (6.32 g)50-605-Apr-2005DJD 128
Southern Lofty
not tested
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.