A typical flower consists of four main parts, which are well explained in the NCERT Class 11 Biology Chapter 5 Notes Morphology of Flowering Plants.  

1. Calyx – The outermost whorl, made up of sepals, which protect the flower bud.  

2. Corolla – The second whorl, made up of petals, usually colorful to attract pollinators.  

3. Androecium – The male reproductive part, consisting of stamens, each with a filament and anther producing pollen.  

4. Gynoecium – The female reproductive part, consisting of carpels (or pistils) with stigma, style, and ovary that develops into fruit after fertilization.