Seeds of South Australia
Cotula bipinnata (Compositae)
Ferny Waterbuttons
List of species for Cotula
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Seed collecting:
November to January
Herbarium regions:
Northern Lofty, Murray, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, Northern and Yorke, South Australian Murray-Darling Basin, South East
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Cotula]
Name derivation:
Cotula from the Medieval Latin 'cotula', which is from the Greek 'kotyle' meaning a small cup; referring to the shape of the involucre. Bipinnata from the Latin 'bi' meaning two and 'pinnata' meaning feathered or winged; referring to the leaf stipules surrounding the stem.
Distribution:
Found in the Mount Lofty Ranges, Kangaroo Island, along the Murray River and in the South-east in South Australia, growing in salt marshes and other saline, temporarily wet land. Also found in Western Australia, Northern Territory, New South Wales and Victoria.
Status:
Naturalised. Common in South Australia. Rare in the Northern Territory. Common in the other states.
Plant description:
Annual herb to 20 cm high with erect, glabrous, branching stems. Leaves oblanceolate to lanceolate, to 60 mm long and 20 mm wide, pinnatisect with pinnatifid segments, base stem-sheathing and pinnate. Flower heads to 8 mm diameter with pale yellow green flowers. Flowering between September and October.
Fruit type:
Dense pale brown daisy head.
Embryo type:
Spatulate.
Seed collecting:
Collect heads that are drying off and turning brown, mature seeds should fall off easily.
Seed cleaning:
Place the heads in a tray for a week to dry. Then rub the heads gently with your hands or a rubber bung to dislodge the seeds. Use a sieve to separate the unwanted material. Be careful as the seeds are very small. 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 germination:
Seeds are non-dormant, viable seed should germinate readily.