Other common name: Hawaiian arrowhead
Arrowhead is a herbaceous aquatic perennial that is very similar to S. montevidensis, the difference being its production of rhizomes and tubers. It is not known to flower in New Zealand.
Arrowhead is an invasive weed with the potential to block waterways.
What to do
Contact your regional council to determine the status of this species and responsibility for control and/or advice on control.
Page last updated: 22 April 2016