Plants of
South Australia
Zoysia macrantha ssp. walshii
Gramineae
Walsh's Couch
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Regional Species Conservation Assessments per IBRA subregion.
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Rare
Vulnerable
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Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
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Oodnadatta
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Keith
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Botanical art

Kath Alcock paintings: 2.

Etymology

Zoysia named after Karl von Zoys (Zois) (1756–1800), an Austrian botanist and and plant collector. Macrantha from the Greek 'macros' meaning large and 'anthos' meaning flower; alluding to the large spikelets. Walshii named after Neville Walsh (1956-), Senior Conservation Botanist at the Royal Botanic Gardens Victoria who helped to elucidate this taxon and distinguish it from Zoysia matrella.

Distribution and status

Found on the lower Eyre Peninsula, Kangaroo Island and the South-east in South Australia, growing on black soil over clay around the edges of coastal saltmarsh and fringing salt lakes. Also found in Victoria and Tasmania. Native. Uncommon in South Australia. Rare in Victoria. Common in Tasmania.
Herbarium regions: Eyre Peninsula, Kangaroo Island, South Eastern
NRM regions: Eyre Peninsula, Kangaroo Island, South East
AVH map: SA distribution map (external link)

Plant description

Perennial grass with deeply buried rhizomes, culms and leaves on erect stems to 10 cm high. Leaves glabrous, blade to 10 cm long and 1.5 mm wide, often inrolled when young, rigid, often sharp-pointed. Inflorescence a spike-like raceme with spikelets to 3 mm long, glume shining, often blackish. Flowering between November and April. Fruits are small short spike. Seed embryo type is lateral.

Seed collection and propagation

Collect seeds between January and June. Use hands to gently strip seeds off the mature seed spike that are turning straw colour. Mature seeds will come off easily. Alternatively, you can break off the whole seed spike. Place the seeds/spike in a tray and leave to dry for two weeks. No further cleaning is required if only seed collected. If seed spikes collected, use hand to strip off the mature seeds. 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:
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LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA26,000 (13.1 g)100+14-Dec-2016JRG551
Kangaroo Island
1-Nov-201770%+5°C, -18°C, -80°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.
Germination table:
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