Contributors

About the Editors

Preface

Acknowledgements

1. 'We Hold these Truths ...'

Terrence Walters, Roy Osborne and Don Decker

2. Saving Ghosts? The Implications of Taxonomic Uncertainty and Shifting Infrageneric Concepts in the Cycadales for Red Listing and Conservation Planning

John Donaldson

3. Character Evolution, Species Recognition and Classification Concepts in the Cycadaceae

Ken D. Hill

4. Morphological Characters Useful in Determining Species Boundaries in Cycas (Cycadaceae)

Anders Lindström

5. Comments on Cycas, Dyerocycas and Epicycas (Cycadaceae)

Chia Jui Chen, Yuen D. Hill and Dennis Wm. Stevenson

6. Classification Concepts in Encephalartos (Zamiaceae)

Piet Vorster

7. Classification Concepts in Macrozamia (Zamiaceae) from Eastern Australia

Paul I. Forster

8. Classification Concepts in Ceratozamia (Zamiaceae)

Loran M. Whitelock

9. Relationships and Phytogeography in Ceratozamia (Zamiaceae)

Andrew P. Vovides, Miguel A. Pérez-Farrera, Dolores González and Sergio Avendaño

10. A Morphometric Analysis of the Ceratozamia norstogii Complex (Zamiaceae)

Miguel A. Pérez-Farrera, Andrew P. Vovides, Luis Hernández-Sandoval, Dolores González and Mahinda Martinez

11. Hypotheses on the Relationship between Biogeography and Speciation in Dioon (Zamiaceae)

Timothy J. Gregory and Jeffrey Chemnick

12. Molecular Phylogeny of Zamia (Zamiaceae)

Paolo Caputo, Salvatore Cozzolino, Paolo De Luca, Aldo Moretti and Dennis Wm. Stevenson

13. Systematics of Meso-American Zamia (Zamiaceae)

Bart Schutzman

14. Zamiaceae of Bolivia, Ecuador and Peru

Dennis Wm. Stevenson

15. In Search of the True Tree: Guidelines for Classification

Roy Osborne and Terrence Walters

Appendix 1: The World List of Cycads

Ken D. Hill, Dennis Wm. Stevenson and Roy Osborne

Appendix 2: Glossary of Terms Encountered in Cycad Systematics

Roy Osborne and Terrence Walters

Index