Which has several small teeth on one side of the leaf margin?

The plant known for having several small teeth on one side of the leaf margin is Coontail. It is characterized by its finely divided, feathery, or whorled leaves that possess a serrated appearance due to these small teeth. This unique leaf structure helps to differentiate Coontail from other aquatic plants.

Parrotfeather, for instance, features needle-like leaves that are not serrated, making it visually distinct from Coontail. Variable leaf milfoil has a more deeply dissected leaf structure with a different arrangement, often showing a limp or softer texture. Hydrilla, while it can have some serration, generally has smooth edges or only slight variations that do not resemble the pronounced teeth found on Coontail leaves.

Understanding the leaf structure is crucial, as it aids in identification and proper management of aquatic plants, especially within the context of weed control practices in Florida.