Nymphoides geminata
Marshwort
Family: Menyanthaceae
Origin: Australia
Regional Pest Management Plan (RPMP) status
- Whole region — Eradication
- National Pest Plant Accord Species
General description
Perennial water lily. Stolons are long and float near surface. Leaves are floating, heart-shaped and < 10 cm in diameter. Flowers are yellow with fringed petal and corolla margins, < 3.5 cm in diameter and borne on long stalks above the water’s surface in November – April.
What you need to know
To help protect our environment:
- You must not breed, distribute, release or sell marshwort. As marshwort is a National Pest Plant Accord species, these restrictions apply within the Auckland region and across the whole of New Zealand.
- You must not plant marshwort within the Auckland region.
Auckland Council will control marshwort at all sites where it is known to occur.
If you see marshwort anywhere in the Auckland region, please report it to Auckland Council at pestfree@aucklandcouncil.govt.nz.
Habitats
Still or slow-moving freshwater bodies.
Dispersal
Vegetative spread from stem and leaf fragments. Human-mediated dispersal through deliberate plantings.
Impact on environment
Forms thick mats, smothering vegetation, impeding drainage, and interfering with recreational activities. Potential to impact on the mauri of wai māori.
Control
Recommended approaches
Do not attempt to undertake control of this species. Please report to Auckland Council.
Caution: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.
