What distinct characteristic does Watermeal possess compared to other aquatic plants?

Watermeal is a unique aquatic plant primarily due to its lack of root structures. Unlike many other aquatic plants that typically have extensive root systems for anchoring themselves in the substrate and absorbing nutrients, Watermeal floats freely on the water's surface and relies on water for nutrient uptake. This absence of roots allows it to thrive in a variety of aquatic environments where other plants might struggle.

The other characteristics, such as large stems, colorful flowers, or long leaves, do not apply to Watermeal, as its structure is quite different from that of typical aquatic plants. Instead, Watermeal is characterized by its tiny, thalloid body, often described as resembling small green grains, which makes it distinct in both appearance and ecological behavior.