Length of the stamens cannot be expressed either by floral formula or by floral diagram

Floral formula components are as follows : In the floral formula, 

Br stands for bracteate K stands for calyx , C for corolla, P for perianth, 

A for androecium and G for Gynoecium, G for superior ovary and G for inferior ovary,  

Sexuality of flower: 

⊕ for actinomorphic and  % for zygomorphic nature of flower. 

Fusion is indicated by enclosing the figure within bracket and adhesion by a line drawn above the symbols of the floral parts.Floral formula also shows cohesion and adhesion within parts of whorls and between whorls.

Floral diagram: A floral diagram provides information about the 

number of parts of a flower, their arrangement and the relation they have with one another. 

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

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