Perennial free-floating, mat-forming aquatic fern. Stems are branched and hairy. Submerged leaves are finely dissected, root-like and often bear spores. Emergent leaves are either juvenile, small and well-spaced, or mature, < 4 x 5 cm, crowded and folded about the midrib, with eggbeater-shaped hairs on the upper surface.
To help protect our environment:
Disturbed sites, lakes, rivers, streams, ditches, wetlands, reservoirs.
Vegetative spread from plantlets and fragments, dispersed by water, wind, waterfowl and other animals. Human-mediated dispersal through deliberate releases and movement of contaminated boats, aquatic plants and fish.
Forms extensive mats, outcompeting and displacing native vegetation. Reduces water quality, clogs waterways and creates a drowning risk for humans and animals.
Do not attempt to undertake control of this species. The Ministry of Primary Industries will carry out the control of this species.
CAUTION: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.