Form: herbaceous aquatic — perennial
Status: present in WA
Hairless perennial with long stolons that root at the nodes and grow out over the water.
Leaves: Floating, somewhat kidney to heart shaped, up to 10cm in diameter, lobed around the margin.
Flowers: Inconspicuous, three millimetres diameter, five to ten in number on a slender stalk two centimetres long. Flowering spring to autumn.
Fruit: Almost circular in outline but compressed two to three millimetres diameter, breaking into segments.
Agricultural and economic impact
An environmental weed, a water weed.
Declared pest category
The Western Australian Organism List (WAOL) contains information on the area(s) in which this pest is declared and the control and keeping categories to which it has been assigned in Western Australia. Use the links on this page to reach hydrocotyl in WAOL.
Requirements for land owners/occupiers and other persons
Requirements for land owners/occupiers and other persons if this pest is found can be sourced through the declared plant requirements link.
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Pest and Disease Information Service (PaDIS)
Control methods for this declared plant can be found through the hydrocotyl control link.