Status of arrowhead in Tasmania
- Arrowhead is a
declared weed in Tasmania under the Tasmanian Weed Management Act 1999. The importation, sale and distribution of arrowhead are prohibited in Tasmania.
- The legal responsibilities of landholders and other stakeholders in dealing with arrowhead are laid out in the arrowhead
Statutory Weed Management Plan.
What does arrowhead look like?
- Arrowhead is a perennial (long-lived), emergent aquatic
herb growing to around 1 metre high. The above-water leaves are
arrow-shaped, 25 cm long and 20 cm wide, and have prominent lobes at the
leaf base giving them their arrow-like shape. Arrowhead also produces
submerged leaves that are usually strap-like. The flowering stems are
erect and can reach 75 cm length, and bear whorls of three flowers at
the apex. The flowers are white and three-petalled, occasionally with
purple bases. Arrowhead has fibrous roots and fleshy rhizomes
- Spread is via seed. Seed is spread in
water, and in mud adhering to machinery, boots and animals. Arrowhead
has also been spread as part of the ornamental plant trade.
Image top right: Arrow head, photo: James Manhart
Images above: Arrow head flowers, photos: Hugh Wilson
Impacts of arrowhead
- Arrowhead is a native of North and South America. On mainland Australia, arrowhead has naturalised in New South Wales.
Arrowhead has not naturalised in Tasmania.
What you need to do
If you locate arrowhead
anywhere in Tasmania, or if you find a plant that you think could be
arrowhead, immediately contact your Regional Weed Management Officer on
1300 368 550 to report this weed.
Arrowhead Statutory Weed Management Plan
Weed Links and Resources
Other useful links
To the extent
permitted by law, the Tasmanian Department of Primary Industries, Parks,
Water and Environment (including its employees and consultants)
excludes all liability to any person for any consequences, including but
not limited to all losses, damages, costs, expenses and any other
compensation, arising directly or indirectly from using information or
material (in part or in whole) contained on this website.