Form: aquatic — perennial
Status: present in WA
Sagittaria is an aquatic rhizomatous perennial to 80 centimetres tall, introduced from America. It is a Weed of National Significance (WoNS)
Stems: Triangular in cross section to 50 centimetres long.
Leaves: Emergent leaves to 25 centimetres long. Submerged leaves strap shaped to 50 centimetres long.
Flowers: On a leafless stem, arising in whorls more than two from the same position. Upper whorls are male flowers the lower females. There are three white petals.
Agricultural and economic impact
Mostly a water weed, a weed of irrigation channels and paddy rice. It is an important weed of rice crops and wetlands in the Eastern States, and is a threat to waterways and wetlands across WA, especially to the Ord River Irrigation Area. It has been found in the Canning River and at Albany.
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 (WA). Search for sagittaria in the WAOL using the scientific name Sagittaria platyphylla.
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 sagittaria control link.