What is a notable feature of Common Duckweed?

The notable feature of Common Duckweed is its glossy green tiny fronds. This aquatic plant is characterized by its small, flat, and ovate leaves that float on the surface of the water. These fronds are typically green and can vary slightly in color and texture, but their small size and glossy appearance are key identifying traits. Common Duckweed's structure allows for efficient photosynthesis and rapid growth, making it a significant species in freshwater ecosystems.

Other choices do not accurately represent the primary characteristics of Common Duckweed. For instance, it does not form extensive underwater roots as it primarily floats on water and anchors itself with thin roots that dangle into the water column. While it does produce flowers, they are not large or particularly colorful, and this aquatic plant can indeed flower, so saying it is exclusively non-flowering is not correct. Therefore, the most distinctive feature remains the glossy green tiny fronds, which are emblematic of the plant.