This fourth edition of Plant Systematics is completely revised and updated. It incorporates the updated International Code of Nomenclature for Algae Fungi and Plants (Shenzhen Code 2018) the new version of PhyloCode (Beta version of Phylocode 5 2014) APweb version 14 (September 2018) revised Angiosperm Phylogeny Group classification (APG IV 2016) new Pteridophyte Phylogeny Group Classification (PPG I 2016) besides the updates since the publication of third edition. The book is a blend of classical fundamental aspects and recent developments especially in the field of molecular systematics cladistics and computer identification. Special attention has been given to information on botanical nomenclature identification molecular systematics and phylogeny of angiosperms. The complicated concepts of phylogeny taxometrics and cladistics have been explained with a view to providing a comparison between these diverse but interactive fields of study. An attempt has been made to build upon a common example when exploring different methods especially in procedures of identification taxometrics and cladistics. The major systems of classification are evaluated critically. Discussion on major families of Pteridophytes Gymnosperms and Angiosperms especially those of major phylogenetic interest form a major portion of this edition. In addition 305 black & white illustrations have been included to provide a better understanding of the plants covered in the book. . Language: English