Fringed Water Lily

Also known as:
Entire Marshwort, Yellow Floating Heart
Family:
Menyanthaceae
Origin:
Eurasia

General description

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.

Potential to form dense mats, outcompeting native vegetation and impeding access to waterways.

Site Management

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.

Recommended approaches

Physical control

Method: Dig out

Plant parts requiring disposal: All parts

Disposal options: Remove to greenwaste or landfill

Biocontrol

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.

Similar species

yellow water lily
Nuphar lutea

Yellow water lily has thick spongy stolons and larger floating leaves.

marshwort
Nymphoides geminata

Marshwort has rounded leaf margins as opposed to scalloped. Lacks reddish-brown flecks on top of leaf.

water poppy
Hydrocleys nymphoides

Water poppy has the inflated mid vein on the underside of the leaf.

Mexican water lily
Nymphaea mexicana

Mexican lily has thick rhizomes rather than thin stolons.

Search tags

RPMP status


National Pest Plant Accord Species
Fringed water lily - Main species image