Seeds of South Australia
Juncus planifolius (Juncaceae)
Broad-leaf Rush
List of species for Juncus
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Seed collecting:
November to April
Herbarium regions:
Flinders Ranges, Northern Lofty, Murray, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Bridgewater (NCP01)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(ii))
Glenelg Plain (NCP02) 
 Rare   (IUCN: RA d(ii))
Lucindale (NCP03) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
Kangaroo Island (KAN01)Kanmantoo
 Near Threatened   [on western end]
Fleurieu (KAN02) 
 Near Threatened   (Probable Decline)   [tolerates some salinity; comes up readily by seed; weeds a threat]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Near Threatened   (Probable Decline)   [tolerates some salinity; comes up readily by seed; weeds a threat]
Broughton (FLB02) 
 Critically Endangered   (IUCN: CR D)   (Definite Decline)   [<50 plants ]
Southern Flinders (FLB04) 
 Critically Endangered   (IUCN: CR D)   (Definite Decline)   [<50 plants ]
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. Planifolius from the Latin 'planus' and 'folium' meaning a leaf; referring to it having flat leaves.
Distribution:
Fund in the southern Flinders ranges, Kangaroo Island, southern Mount Lofty Ranges and the South-east in South Australia, growing in disturbed and undisturbed damp sites such as swamps, creeks, paddocks and roadside ditches. Also found in all states (and New Zealand, Chile, Hawaii) except in the Northern Territory.
Status:
Native. Uncommon in South Australia. Common in the other states.
Plant description:
Tufted or with short vertical rhizome, annual or perennial sedge with leafless, slender stems (culms) to 30 cm high. Leaves mainly basal, glabrous, solid, flat, or slightly channelled, grass-like, to 8 mm wide, shorter than or occasionally equalling the stems. Inflorescence terminal, diffuse or head-like spike to 12 cm long with clusters of red-brown flowers. Flowering between September to February.
Fruit type:
Clusters of golden brown to red-brown ovoid capsules with numerous seeds.
Seed type:
Tiny orange ellipsoid seed to 0.4 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.
Seed viability:
From collection, the seed viability was high, at 100%
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA185600 (5.94 g)403-Jan-2007RJB71002
Murray
1-Aug-2007100%-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.