Submerged perennial aquatic. Stems are slender, brittle, branched and prickly. Leaves are triangularly toothed, prickly, < 45 mm long and opposite or in whorls of three. Flowers are tiny, green and borne in leaf axils. Achenes are plump and olive green/reddish.
To help protect our environment:
Saline and freshwater bodies, ponds, lakes, reservoirs, slow-moving streams
Seeds dispersed by waterfowl. Vegetative spread from fragments. Human-mediated dispersal through movement of contaminated ballast water.
Forms dense mats, outcompeting and displacing other vegetation. Clogs and impedes access to waterways.
Consider an aquatic pest plant control operator.
CAUTION: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.