What is a notable developmental feature of cattails as they mature?

As cattails mature, one of their defining characteristics is the presence of flowers that arise on cylindrical spikes. This feature is notable as it distinguishes cattails from many other aquatic plants. The cylindrical spike structure is where the flowers develop and eventually produce seeds, contributing to the plant's reproductive cycle. The dense arrangement of flowers on these spikes provides a distinctive visual cue, making cattails easily recognizable in wetland environments.

This reproductive strategy is particularly effective for cattails, allowing for efficient seed production in their native habitats. Their spikes can be quite conspicuous, especially during the flowering season, which further highlights this feature's importance in identifying the plant.