Fringed water lily
Also known as:
Entire marshwort, yellow floating heart
Regional Pest Management Plan (RPMP) status
- National Pest Plant Accord Species
Perennial bottom-rooted aquatic herb. Stems are long, branched and creeping below the water's surface, with adventitious roots. Leaves are floating, heart-shaped, < 15 cm in diameter and green, with purple undersides and scalloped margins.
Flowers are yellow, borne singly or in clusters on emergent stalks, and have fringed petals. Seed capsules are green, flattened and contain many hairy-edged seeds.
What you need to know
To help protect our environment:
- You must not breed, distribute, release or sell fringed water lily. As fringed water lily is a National Pest Plant Accord species, these restrictions apply within the Auckland region and across the whole of New Zealand.
Rivers, lakes, ponds, reservoirs, wetlands, dams, ditches.
Seeds dispersed by water and waterfowl. Human-mediated dispersal through deliberate plantings, ornamental pond escapes and movement of contaminated boats and equipment.
Impact on environment
Potential to form dense mats, outcompeting native vegetation and impeding access to waterways.
Increasing shading over the waterway can reduce an infestation. Spraying aquatic weeds result in plants rotting in the water. This decreases dissolved oxygen in the water and in large amounts can kill aquatic life. Consider pulling out and only spraying regrowth in spring.
Method: Dig out.
Plant parts requiring disposal: All parts.
Disposal options: Remove to greenwaste or landfill.
Biocontrol is currently not available for this species.
Community agrichemical control recommendations
Certified Handler/Experienced agrichemical user: Foliar spray emergent foliage with 100ml glyphosate green per 10L of water.
Caution: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.