Classification is the arrangement of plants into groups having common characteristics. These groups are arranged into a system. Similar species of flowering plants are placed in a Genus, similar genera grouped into families; families with common features are arranged into orders; orders into classes and classes into divisions

The aim of classification is to place the plants into a hierarchy of ranks or categories such as species, genera, families and so on. In addition to expressing relationship based on common features, classification serves as a filing and information retrieval system and allows easier reference to organisms comprising the filing system i.e. it provides an idea bout the sequence of evolution of plants from simple to more complex and from more primitive to more advanced types.The criteria of the classification are the characters on which the classification is based. The characters of an organism are all the features or attributes (leaf width, stamen number, corolla length, locule number, placentation, etc) possessed by the