In biology, a whorl (also known as verticil) is an arrangement of sepals, leaves, petals, carpels or stamens, radiating from a specific point and wrapping around the stalk or stem. A whorl of leaves is made up of at least three components.
Four different forms of whorls comprise the morphological structure of mainly cyclic flowers:
- Calyx forms the outermost whorl of a flower, and its members are called sepals.
- Corolla is made up of petals. Usually, flowers possess bright petals to attract pollinating insects.
- Stamens make up the androecium. Each stamen, representing the male reproductive organ, is composed of an anther and a filament or stalk.
- Gynoecium represents the female reproductive component of the flower and is composed of one or more carpels. Stigma, style, and ovary comprise the three parts of a carpel.
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