Plants of
South Australia
Juncus flavidus
Juncaceae
Yellow Rush
Regional Species Conservation Assessments per IBRA subregion.
Least concern
Near threatened
Rare
Vulnerable
Endangered
Critically endangered
Extinct
Data deficient
Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
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Botanical art

Kath Alcock paintings: 3.

Etymology

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 and status

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. Native. Common in South Australia. Uncommon in Western Australia. Common in the other states.
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
AVH map: SA distribution map (external link)

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. Fruits are clusters of golden brown ellipsoid capsules with numerous seeds. Seeds are tiny orange ellipsoid seed to 0.6 mm long and 0.3 mm wide, with fine reticulated surface. Seed embryo type is broad.

Seed collection and propagation

Collect seeds between February and June. Collect fruits either by picking off the mature heads, those turning brown and come-off easily or break-off the whole spikes. 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.

Seeds stored:
  Hide
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
 
MSB

80,000 (0.64 g)
5011-Oct-2007RJB75089
Northern Lofty
100%
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.