A flower is the reproductive structure of angiosperms (flowering plants). It consists of four major parts:
1. Calyx (Sepals):
The outermost whorl, usually green.
Protects the flower bud before it opens.
2. Corolla (Petals):
Brightly colored to attract pollinators.
Contains nectar glands.
3. Androecium (Male Reproductive Organ):
Composed of stamens, each with a filament and an anther.
Anther produces pollen grains containing male gametes.
4. Gynoecium (Female Reproductive Organ):
Consists of carpels/pistils, each with a stigma, style, and ovary.
The ovary contains ovules, which develop into seeds after fertilization.