What do you mean by artificial and natural systems of classification? Can you also tell me the difference between the two? And, what is phylogenetic classification?

Three types of classification system are present 1. Artificial system of classification - Based on Morphological Characters , scientists in support of this classification are - Theophastrus , Aristrotle , Bauhini , Linneaus etc 2. Natural system of classification - Based on morphological characters , cytology , embryology etc Scientists who supported : John ray , Decandolle , Bentham and Hooker 3. Phylogenetic system of classification - Based on evolutionary relationships as that by Engler & Prantl in their book - Die Naturlichen Pflanzenfamilien