Applied Botany, provides in sequence about contemporary plant science study and its importance in the present context. The study of plants and botany began with tribal lore, used to identify edible, medicinal and poisonous plants, making botany one of the oldest sciences. From this ancient interest in plants, the scope of botany has increased to include the study of over 550,000 kinds or species of living organisms. Investigating how plant species are related to each other allows botanists to better understand the process of evolution in plants.