A cattail is an example of which of the following flower types?

A cattail is categorized as a line flower due to its tall, slender, and upright structure. Line flowers are typically characterized by their ability to provide height and create vertical lines in floral arrangements, contributing to the overall contour and structure. The elongated spike of the cattail not only adds height but also adds interest and texture to arrangements, making it a primary element in achieving a balanced composition.

In contrast, mass flowers are used primarily for creating density in arrangements, filler flowers serve to fill in spaces or gaps, and form flowers are distinctive in their unique shapes and forms. Cattails do not possess the characteristics that define these other flower types, reinforcing why they are best classified as line flowers.