Leaves are bright green with visible saw-toothed margins and are rough. Leaves grow in whorls of 4-8 along the stem. The stems are very slender, can grow up to 30 feet long and branch out considerably near the water surface. This is a submerged aquatic plant.
Concern: Hydrilla is a threat to native aquatic ecosystems. It can alter the ecology of the water body interfering with boating and fishing.