Flowers that have sepals, petals, stamen, and pistils are known as?

The term for flowers that possess all four essential floral parts—sepals, petals, stamens, and pistils—is complete flowers. This classification signifies that the flower includes both reproductive structures (the stamens and pistils) and non-reproductive structures (sepals and petals), making it capable of performing all the necessary functions for reproduction.

In botany, a complete flower ensures that it has the full assembly of parts to facilitate reproductive processes, such as pollination and seed production. This is vital for the plant's ability to propagate and share its genetic material.

The concept of completeness focuses specifically on the presence of all floral organs. Other terms like perfect flowers refer to a flower that has both male (stamens) and female (pistils) reproductive structures but does not address the presence of sepals and petals. Incomplete flowers lack one or more essential parts, while imperfect flowers have either stamens or pistils but not both, hence further differentiating them from complete flowers.