What is a notable feature of Parrotfeather (Myriophyllum aquaticum)?

Parrotfeather (Myriophyllum aquaticum) is an aquatic plant known for its adaptability to different water levels. A notable feature of this species is that its stems can grow above the water surface, often reaching heights of around 8 inches. This characteristic allows the plant to thrive in environments where water levels can fluctuate, enabling it to capture sunlight effectively for photosynthesis.

This ability to grow both submerged and emersed gives Parrotfeather a competitive edge in its habitat, contributing to its invasiveness in some regions. In contrast, the other options do not accurately represent the features of Parrotfeather. For example, the statement that it can only grow submerged contradicts the observed behavior of the plant, which can also have emergent growth. Saying it has no emersed or submerged characteristics overlooks its capacity to adapt to different environmental conditions. Additionally, while seeds are produced, the plant is also known for its vegetative reproduction, making the claim that it produces seeds only misleading.