Which of the following is an emergent aquatic plant?

• A. Phragmites
• B. Spirogyra
• C. Elodea
• D. Water Lettuce

Answer: (A)

Emergent aquatic plants are rooted in the bottom sediments with most of the plant’s photosynthetic parts rising above the water surface. They live at the water’s edge, with roots in wet soil and stems and leaves that extend into the air to capture sunlight.

Phragmites fits this pattern: it is anchored in mud or saturated soil, and its tall stems and leaves rise above the water, making it a classic emergent plant.

In contrast, Spirogyra stays entirely underwater as filamentous algae, Elodea is a submerged water plant growing below the surface, and Water Lettuce floats on the surface with roots hanging down, not with stems above water.