Question

What is meant by polysepalous calyx?

Answer 1

Hint: The plants which are capable of producing flowers are called Angiosperms. Another name of Angiosperm is Magnoliophyta. The flower is the reproductive organ of a plant. Flower comprises green colored sepals. Sepals are responsible for protecting the bud. Sepals also support the petals during blooming. These sepals are collectively named calyx.

Complete answer:
Calyx can be classified according to size, structure, modification, loss and persistence, and fusion.
Based on structure, the calyx is six types. These are Tubular, cupulate, urceolate, Infundibuliform, campanulate, and bilabiate. Tubular calyx possesses tube-like calyx. Cup like structure is found in the cupulate calyx, urn shaped calyx involves urceolate calyx. Infundibuliform calyx involves funnel-like calyx. The campanulate calyx bears a bell-like structure and the bilabiate calyx comprises two lips.
Based on size calyx are two types. These are regular and irregular. Regular calyx comprises the same sized sepals. Irregular calyx involves sepals of different sizes.
According to the modification, the calyx is of four types. These are Pappus, spurred, spinous, and petaloid. Pappus calyx involves the transformation of sepals into a hairy feather-shaped structure. Spurred calyx forms a beak-shaped structure. Petaloid calyx involves enlarged and colored sepals and the spinous calyx forms spines due to modification.
According to loss and persistence, the calyx is two types. These are Caducous and Deciduous. After blooming, sepals have fallen. This is found in the caducous calyx. Deciduous calyx involves falling of sepals after fertilization.
According to fusion, the calyx is classified into Gamosepalous and Polysepalous. Gamosepalous bears fused sepals and the Polysepalous comprises free sepals.

Note:
Calyx is a modified form of leaves. The lowest portion of the flower is called the calyx. The calyx is composed of veins and stomata which are found in leaves. It is the thick hard structure of the flower. The portion of the flower which develops first is the calyx. It is found close to the stem. The outermost portion of the flower is formed by the calyx.