The use of phylogeny for classification was done by Eichler, Blessy, Whittaker, Engler, and Prantl, Hutchinson. Phylogenetic System : Classification based on the evolutionary relationship of plants. Bentham and hooker, Adanson, Candolle used a natural system of classification.ģ. Natural System: In this system, the classification is based on all the important related characters. Theophrastus, Pliny, and Linnaeus used an artificial system of classification.Ģ.
Artificial System: In this system, the classification is based on few morphological characters. Whittaker classified the whole living organism into five kingdoms based on the complexity of cell structure (Prokaryotic and Eukaryotic), the complexity of the body (unicellular and multicellular), and mode of nutrition (autotrophs and heterotrophs).Īll the classification systems, starting from that of Aristotle to the 20 th century, can be divided into three types:ġ.
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