Seeds of South Australia
Juncus australis (Juncaceae)
Austral Rush
List of species for Juncus
Click on an image to enlarge it
Seed collecting:
November to March
Herbarium regions:
Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, South East
IBRA regions
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)
Lucindale (NCP03) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)
Tintinara (NCP04) 
 Vulnerable   (IUCN: VU D2)   [probable decline]
Fleurieu (KAN02)Kanmantoo
 Rare   (IUCN: RA d(ii))   [tolerates some disturbance; fluctuates]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   [tolerates some disturbance; fluctuates]
Lowan Mallee (MDD04)Murray Darling Depression
 Endangered   (IUCN: EN D)   (Probable Decline)   [needs wet conditions; highly restricted; only a few plants left]
Wimmera (MDD05) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)
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. Australis means of or from the south; referring to the distribution of the species in the southern hemisphere.
Distribution:
Found in the southern Mount Lofty Ranges and the South-east in South Australia, growing  in wet or seasonally wet situations in grasslands and woodlands. Also found in New South Wales, Victoria, Tasmania and New Zealand.
Status:
Native. Rare in South Australia. Common in the other states.
Plant description:
Loosely tufted perennial rush growing from a shortly creeping rootstock, with cylindrical stem to 120 cm high and 4 mm diameter, dull green to dull blue-green, not easily compressed, pit interrupted with large air-spaces. Inflorescence in 1 to many sub-globular clusters with many pale brown flowers. Flowering in spring and summer.
Fruit type:
Clusters of golden brown ellipsoid capsules with numerous seeds.
Seed type:
Tiny orange ellipsoid seed to 0.5 mm long and 0.2 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 four collections, the seed viability were high, ranging from 95% to 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA116000 (1.35 g)5012-Jan-2008RJB76884
Southern Lofty
19-Sep-2008100%+5°C, -18°C
BGA175000 (2.26 g)5024-Nov-2007RJB75882
Southern Lofty
19-Sep-2008100%+5°C, -18°C
BGA29000 (0.46 g)20+1-Mar-2010KHB373
Southern Lofty
Jun-201095%+5°C, -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.