Explain : How floral diagram is drawn ?

$\rightarrow$A floral diagram provides information about the number of parts of a flower, their arrangement and the relation they have with one another.

$\rightarrow$ The position of the mother axis with respect to the flower is represented by a dot on the top of the floral diagram.

$\rightarrow$ $4$ Calyx, corolla, androecium and gynoecium are drawn in successive whorls, calyx being the outermost and gynoecium being in the centre.

$\rightarrow$ Floral formula also shows cohesion and adhesion within parts of whorls and between whorls.