Seeds of South Australia
Juncus amabilis (Juncaceae)
Beautiful Rush
List of species for Juncus
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Seed collecting:
February to April
Herbarium regions:
Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, South East
IBRA regions
Bridgewater (NCP01)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU D2)
Glenelg Plain (NCP02) 
 Vulnerable   (IUCN: VU D2)
Lucindale (NCP03) 
 Vulnerable   (IUCN: VU D2)
Fleurieu (KAN02)Kanmantoo
 Endangered   (IUCN: EN D)   [opposite Glen Shera Swamp - has been searched for, probably extinct]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)   [restricted range; willows, weeds & spraying - threats]
Lowan Mallee (MDD04)Murray Darling Depression
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)
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. Amabilis from Latin meaning beautiful, worthy of love, pleasing; unsure of how this is related to the species.
Distribution:
Found in the southern Mount Lofty Ranges and the South-east in South Australia, growing damp sites. Also found in Western Australia, New South Wales, Victoria and Tasmania.
Status:
Native. Rare in South Australia. Uncommon in Western Australia and Tasmania. Common in the other states.
Plant description:
Densely 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 in 1 to many sub-globular clusters with many pale brown flowers. Flowering between December and February.
Fruit type:
Clusters of golden brown ellipsoid capsules with numerous seeds.
Seed type:
Tiny orange ovoid seed to 0.4 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 three collections, the seed viability were high, ranging from 90% to 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
165000+163214 (4.62+4.57 g)
325,000 (9.11 g)
22-Feb-2005DJD 117
Southern Lofty
28-Mar-200695%+5°C, -18°C
BGA138000 (1.218 g)30+9-Feb-2009DJD1491
Southern Lofty
20-Jul-2009100%-18°C
BGA390000 (4.41 g)15+14-Apr-2010KHB400
Southern Lofty
1-Jan-201290%+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.