The word taxonomy is derived from the Greek words taxis meaning arrangement and nomos meaning law. The branch of botany that deals with the basis, purpose and principles of classification of plants is called taxonomy. According to scientist E. Mayer (1969), Taxonomy is the theory and practice of classification. French botanist A. P. de Candolle first used the term taxonomy. The Swedish scientist Carolus Linnaeus contributed the most to the taxonomy of plants. That is why he is called Father of Taxonomy.