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.
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.
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:
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.