Unit -I Systematics of Gymnosperms Gymnosperms Introduction Unit - II Diversity of Gymnosperms : Palaeobotany Fossilization and Fossil Gymnosperms Unit - III Diversity of Living Gymnosperms Class-Cycadopsida Class-Coniferopsida Unit - VI Systematics of Flowering Plants Anglosperms: Introduction Evolution of Classification Modern Trends in Taxonomy Unit - V: How to Describe an Angiosperm How to Describe an Angiospermic Plant Unit - VI: Diversity of Flowering Plants The Dicotyledones Order - Leguminales Order-Malvales Order - Euphorbiales Order - Rutales Order - Apocynales