Write a brief account on the class of Dicotyledanae of Bentham and Hooker's classification.

Explanation

The class Dicotyledonae are characterised by tap root, reticulate venation, tetramerous or pentamerous flowers and two. cotyledons in a seed. On the basis of the number of whorls in the Perianth and the condition of petals, the dicotyledons are divided into three sub-classes namely Polypetalae, Gamopetalae and Monochlamydae. Polypetalae was divided into three series namely. 1) Thalamiflorae. 2) Disciflorae and 3) Calyciflorae, Gamopetalae was divided into three series viz. 1. Inferae 2. Heteromerae and 3. Bicarpellatae. Monochlamydae was divided into eight series.