Perennial, bottom-rooted aquatic herb. Rhizomes are stout and erect. Stolons are creeping and tuberous. Leaves are floating, round, heart-shaped, < 20 cm in diameter and green with brown flecks on top, with a pink/purple underside. Flowers are yellow, < 15 cm in diameter and borne above the water surface in October – December. Fruit is spherical to ovoid, < 2.5 cm diameter and ripens in summer – autumn.
To help protect our environment:
Still and slow-moving freshwater bodies.
Seeds dispersed by water movement. Vegetative spread from rhizomes and tubers, dispersed by water. Human-mediated dispersal through deliberate plantings.
Forms dense mats and may displace submerged aquatic plants. Reduces dissolved oxygen levels, affecting fish, zooplankton and other native species.
Follow up treated areas 3 times per year.
CAUTION: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.