Which best describes alligatorweed?

Alligatorweed is characterized by its hollow stems with opposite leaves. This aquatic plant has a distinctive growth habit where the leaves are arranged in pairs directly across from one another along the stem, which helps to identify it in its natural habitat. The hollow stems contribute to its buoyancy, allowing it to thrive in water-covered environments, making it a notable invasive species in many areas.

Understanding the physical attributes of alligatorweed is essential not only for identification but also for effective management strategies. Recognizing its structure can aid individuals in the field to differentiate it from other aquatic plants, inform pesticide application practices, and improve overall aquatic weed control efforts.