Pbylogenetic system involves the classification of plants, .according to the evolutionary and genetic affinities. This system of classification was proposed by Engler in 1886, by Hutchinson in 1926 and by Tippo in 1942. John Hutchinson (1884−1972) ah English botanist has given the latest information about the phylogenetic classification of angiosperms which has been published in his famous work Families of flowering plants recently in 1959 (after being published twice in 1926 and 1934). Carolus Linnaeus (1707−1778), a great Swedish botanist known as Father of Modern botany followed the binomial system of nomenclature. He proposed an artificial sexual system of classification containing 24 classes. The outline of the classes of his system was published in Systema Naturae in 1735, and again in Genera Plantarum in 1737. George Bentham and Sir Joseph Dalton Hooker, established and published jointly a Natural System of Classification, containing 202 orders, in a monumental work Genera Plantarum. It is the most popular, and applicable system. Theophrastus (370−285B.C), the Father of botany classified plants on the basis of form and texture. He has described about 450 cultivated plants and classified them in his Historia Plantarum. His classification was strictly artificial.