What plant has flowers that resemble showerheads and contain up to 25 hard seeds?

The American lotus is known for its distinctive flowers that resemble large, white to yellow showerheads, which float on the surface of the water. This aquatic plant is characterized by its broad leaves and striking blooms that can rise above the water on sturdy stalks. The flowers are not only notable for their appearance but also for their seed capsules, which can contain up to 25 hard seeds. These seeds are designed to withstand harsh conditions, contributing to the plant's propagation in its natural habitat.

In contrast, other options present different characteristics. The white waterlily has a different floral structure and lacks the showerhead appearance. Spatterdock, while also an aquatic plant, features yellow flowers and a more rounded leaf shape. Floatinghearts are smaller, with heart-shaped leaves and do not have the same robust flower structure as the American lotus. Thus, the unique floral and seed characteristics of the American lotus make it the correct choice in this context.