Preface; Acknowledgements; Part I. Introduction to Floral Diagrams: 1. Introduction to flower morphology; 2. The significance of floral diagrams; 3. Floral diagrams used in this book; Part II. Floral Diagrams in the Major Clades: 4. Systematic significance of floral diagrams; 5. Basal Angiosperms: the ascent of flowers; 6. Monocots: variation on a trimerous Bauplan; 7. Early diverging eudicots: a transition between two flower types; 8. Basal Pentapetalae: the event of pentamerous flowers; 9. Rosids: the diplostemonous alliance; 10. Caryophyllids: how to reinvent lost petals; 11. Asterids: tubes and pseudanthia; Part III. Conclusions: 12. Distinctive systematic characters and apomorphic tendencies; 13. Floral diagrams and major Angiosperm groups; 14. Outlook; References; Glossary.