Emergent, perennial aquatic herb < 1 m tall. Leaves are basal, < 10 x 20 cm and broad ovate, with a long petiole. Flowers are pale lilac/pink/red/white and borne on large, multi-branched panicles in summer. Achenes are held in a dense circular head and produced in summer – autumn.
To help protect our environment:
Still or slow-moving water body margins, wetlands.
Seeds dispersed by waterfowl and water movement.
Potential to displace native species. Impedes water flow and traps debris, causing silt build-up. May exacerbate flooding.
Consider engaging an aquatic pest plant control operator. Contact Auckland Council for control options.
Do not attempt to undertake control of this species on Aotea/Great Barrier Island group. Please report to Auckland Council if seen on Aotea/Great Barrier Island group.
CAUTION: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.