Seeds of South Australia
Juncus flavidus (Juncaceae)
Yellow Rush
List of species for Juncus
Click on an image to enlarge it
Seed collecting:
February to June
Herbarium regions:
Flinders Ranges, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Vulnerable   (IUCN: VU D2)
Lucindale (NCP03)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU D2)
Fleurieu (KAN02)Kanmantoo
 Rare   (IUCN: RA d(ii))   [sensitive to climate change]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Near Threatened   [sensitive to climate change]
Broughton (FLB02) 
 Least Concern
Olary Spur (FLB03) 
 Least Concern
Southern Flinders (FLB04) 
 Least Concern
Northern Flinders (FLB05) 
 Rare   (IUCN: RA d(i,ii))   [on Mawson Plateau]
St Vincent (EYB02)Eyre Yorke Block
 Least Concern
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))
Murray Lakes and Coorong (MDD03) 
 Vulnerable   (IUCN: VU D2)   [edge of range]
Wimmera (MDD05) 
 Vulnerable   (IUCN: VU D2)
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 Juncus]
Name derivation:
Juncus from the Latin 'jungere' meaning to tie or bind; referring to the use of the rushes for weaving and basketry. Flavidus from Latin meaning yellowish; possible referring to the yellowish appearance of its inflorescence.
Distribution:
Found in the Flinders Ranges, Mount Lofty Ranges and the South-east in South Australia, growing  in wet depressions and along drainage lines. Also found in Western Australia, Queensland, New South Wales and Victoria.
Status:
Native. Common in South Australia. Uncommon in Western Australia. Common in the other states.
Plant description:
Tufted perennial rush arising from a rhizome with greyish-green stems to 120 cm high and 2.3 mm diameter, easily compressed, pith interrupted pith with large air-spaces. Inflorescence with clustered or scattered heads with mny with many pale brown flowers. Flowering between December to March.
Fruit type:
Clusters of golden brown ellipsoid capsules with numerous seeds.
Seed type:
Tiny orange ellipsoid seed to 0.6 mm long and 0.3 mm wide, with fine reticulated surface.
Embryo type:
Broad.
Seed collecting:
Collect fruits either by picking off the mature heads, those turning brown and come-off easily or break-off the whole spikes.
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 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.