A flower's calyx, often seen as the external part of the flower, plays a crucial role in the flower's development. Situated at the base of the flower, the calyx is made up of leaf-like structures, commonly referred to as sepals. More often than not, the number of sepals matches the number of petals in a flower. Although most calyces are green, the calyx can sometimes be of the same color as the flower or even of a completely different hue.
The calyx is positioned right below the corolla. When the calyx and corolla are alike and indistinguishable, they are collectively termed as the perianth. Even after the flower has bloomed, the calyx continues to facilitate the growth of the fruit.
The calyx serves a vital role in the life of a flowering plant. It shields the budding flower and prevents it from drying out. In a bud state, the flower is tightly encased by the sepals, which form the outermost layer of the flower.
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