Submerged aquatic. Stems slender, branching and < 90 cm long. Leaves are narrow, opposite or in whorls, toothed and tapered to a blunt or pointed tip. Flowers are small, inconspicuous and borne in leaf axils.
To help protect our environment:
Still or flowing freshwater bodies, lakes, stream, ponds, ditches.
Seeds dispersed by water. Vegetative spread from stem fragments. Human-mediated dispersal through movement of contaminated boats and equipment.
Can form dense infestations, outcompeting native plants and clogging waterways.
Consider engaging an aquatic pest plant control operator to control large infestations. Follow up treated areas each year.
CAUTION: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.