Plants of
South Australia
Marsilea costulifera
Marsileaceae
Narrow-leaf Nardoo
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Regional Species Conservation Assessments per IBRA subregion.
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Near threatened
Rare
Vulnerable
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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: 8.

Etymology

Marsila named after Count Luigi Ferdiando Masili (1658-1730), an Italian scholar and eminent natural scientist, whose name was Latinised as Marsilius. Costulifera from the Latin 'costula' diminative of rib and 'ferens' meaning carrying or bearing; referring to its distinctive small ribs on the sporocarps.

Distribution and status

Found across South Ausralia, growing in mud on the edges of swamps, billabongs and shallow depression. Also found in all mainland states. Native. Uncommon in South Australia. Uncommon in Western Australia and the Northern Territory. Common in the other states.
Herbarium regions: Lake Eyre, Gairdner-Torrens, Flinders Ranges, Northern Lofty, Murray, Kangaroo Island, South Eastern
NRM regions: Kangaroo Island, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
AVH map: SA distribution map (external link)

Plant description

Rhizome glabrous herb except at tips, slender, becoming woody. Fronds clustered at nodes with the four leaflets unequally arranged, oblanceolate to narrowly cuneate, to 12 mm long and 8 mm broad, surfaces sparsely hairy or glabrous, margin straight to slightly rounded, entire. Fruits are brown bean-shaped pod (Sporocarp) to 4 mm, slightly ribbed, densely hairy, clustered together on stalk shorter than pod. Seeds are fine spores.

Seed collection and propagation

Collect seeds between October and August.