Paleobotany is a branch of botany that studies fossil plants, their classification, and evolution. Synonyms for the word paleobotany include palaeophytology, fossil botany, and paleophytogeography. Palaeophytology is similarly used to describe the scientific study of fossil plants, while fossil botany, as the name indicates, focuses on the examination of plant fossils. Paleophytogeography, on the other hand, deals with the reconstruction of past vegetation and geographical distribution of plants. Regardless of the term used, paleobotanists play an essential role in providing valuable information about plant evolution, the history of earth's vegetation, and the environmental changes that have occurred over millions of years.