Botany is divided into a number of branches:Plant PathologyIt is the study of organisms and environmental conditions that are liable for causing diseases in plants, the mechanisms by which the disease occurs, and therefore the methods of controlling plant diseases.Plant Ecology Plant ecology studies the distribution of plants, how do the environmental factors affect plants and therefore the interaction between plants and other organisms.PalaeobotanyIt is a type of botany that deals with the recovery and identification of plant fossils, thereby, studying the evolutionary history of plants.ArchaeobotanyIt is the branch of Botany in which scientists study as to how were the plants used by the people in the past. Understanding a plant also helps in understanding the medicinal and spiritual significance of a plant in the past.Forensic BotanyForensic botany is the use of plants and parts of plants like pollens, seeds, leaves, etc. to investigate criminal or non-criminal cases, legal disputes or questions, to discover the cause of death or former location.