Perennial bottom-rooted aquatic herb that is submerged in winter and floats to the surface in summer. Leaves are deep green, brittle, spiny, sharply pointed and formed in a rosette, resembling a pineapple top. Flowers are white, delicate and borne on stalks in January. Fruits are fleshy berries.
To help protect our environment:
Still freshwater bodies, lakes, ponds, ditches.
Seeds dispersed by water. Vegetative spread from stolons and plantlets. Human-mediated dispersal through deliberate plantings.
Can form dense mats, displacing native vegetation. Clogs waterways, impeding drainage and recreational activities.
Follow up treated areas 3 times per year. Encourage natural regeneration of native plants or replant treated areas where possible after 2-3 treatments to establish dense ground cover and minimise reinvasion.
CAUTION: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.