5.8 Semi-Technical Description of a Typical Flowering Plant

Various morphological features are used to describe a flowering plant.

The plant is described based on its habit, vegetative characters – roots, stem and leaves and then floral characters inflorescence and flower parts.The floral formula of a plant is represented by some symbols.

Floral diagram with floral formula
Floral diagram with
floral formula

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 for inferior ovary, for male, for female , for bisexual plants, 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. 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.

Floral formula also shows cohesion and adhesion within parts of whorls and in between whorls. The floral diagram and floral formula in Figure represent the mustard plant (Family: Brassicaceae).

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