Seeds of South Australia
Baumea arthrophylla (Cyperaceae)
Fine Twig-sedge
List of species for Baumea
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Seed collecting:
November to May
Herbarium regions:
Lake Eyre, 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
SUMMARY
Mount Gambier (SVP02)Southern Volcanic Plain
 Least Concern
Bridgewater (NCP01)Naracoorte Coastal Plain
 Least Concern
Glenelg Plain (NCP02) 
 Least Concern
Lucindale (NCP03) 
 Least Concern
Tintinara (NCP04) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [restricted to Gum Lagoon]
Kangaroo Island (KAN01)Kanmantoo
 Rare   (IUCN: RA d(ii))   [needs reasonably fresh water; grown in swamps; limited habitat]
Fleurieu (KAN02) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   [in degraded areas]
Broughton (FLB02) 
 Vulnerable   (IUCN: VU A2ac )   (Definite Decline)
Southern Flinders (FLB04) 
 Rare   (IUCN: RA ab)   (Definite Decline)
Northern Flinders (FLB05) 
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [Goats & lack of rain - threats]
Central Flinders (FLB06) 
 Vulnerable   (IUCN: VU D2)   [Wilpena Ck; needs permanent water]
Eyre Hills (EYB03)Eyre Yorke Block
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [limited habitat, along roadsides]
Talia (EYB04) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [limited habitat, along roadsides]
Murray Mallee (MDD02)Murray Darling Depression
 Vulnerable   (IUCN: VU D2)   [edge of range]
Murray Lakes and Coorong (MDD03) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)
Lowan Mallee (MDD04) 
 Vulnerable   (IUCN: VU D2)
Wimmera (MDD05) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Peake-Dennison Inlier (STP04)Stony Plains
 Vulnerable   (IUCN: VU D2)   [needs permanent water]
Witjira (STP06) 
 Vulnerable   (IUCN: VU D2)   [needs permanent water]
IBRA regions
DISPLAY ALL
Mount Gambier (SVP02)Southern Volcanic PlainLeast Concern
4 of 4 subregionsNaracoorte Coastal PlainLeast Concern
, Rare
2 of 2 subregionsKanmantooRare
5 of 6 subregionsFlinders Lofty BlockRare
, Vulnerable
, Endangered
2 of 5 subregionsEyre Yorke BlockRare
4 of 6 subregionsMurray Darling DepressionRare
, Vulnerable
2 of 7 subregionsStony PlainsVulnerable
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. Arthrophylla from the Greek 'arthron' meaning joint and 'phyllon' meaning leaf.
Distribution:
Found mainly in the southern part of South Australia, from the Gammon Ranges with isolated distribution in hot springs further north, growing mainly in swamps. Also found in all other states.
Status:
Native. Common in South Australia. Rare in Northern Territory and Queensland. Common in all other states.
Plant description:
Perennial sedge with stems to 2 m high, slender, subterete or compressed, at times somewhat pitted or indistinctly septate with one stem leaf, with a short lamina or almost reduced to the sheath. Inflorescence a spike to 25 cm long with brown spikelets. Flowering between September to March.
Fruit type:
Large brown fruit heads at the tip of stems.
Seed type:
Light brown, woody ellipsoid nut to 4 mm long and 2 mm wide.  
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.
Seed viability:
From one collection, the seed viability was high, at 95%.
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
BGA13700 (12.68 g)100+12-Mar-2010TST923
Southern Lofty
Jun-201095%-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.