Cycad classification : concepts and recommendations /

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作者：edited by Terrence Walters and Roy Osborne.

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ISBN：9780851997414

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简介

简介

Cycads resemble palms, but are taxonomically quite different. They are a significant and irreplaceable component of the planet's biological diversity, having evolved various and often unique morphological, anatomical and biochemical features during their 250-million-year evolutionary history. Many cycad species exist today only as small, poorly-known or isolated populations or as ornamental species in botanic gardens. In order to understand fully, as well as to conserve, this internationally endangered tropical plant group, it is paramount that cycad systematics is studied, documented and refined.This volume presents the current state of our knowledge of the systematics of the approximately 300 species of cycads. It includes contributions from leading researchers from Australia, China, Italy, Mexico, South Africa, Thailand and the USA. It has been developed from papers presented at a workshop held in 2002 at the Montgomery Botanical Center.

CONTENTS
Preface ...........................
Acknowledgments ........................
Chapter 1: "We hold these truths." Terrence Walters, Roy Osborne
and Don Decker .........................
Chapter 2: Saving ghosts? The implications of taxonomic
uncertainty and shifting infrageneric concepts in the Cycadales
for Red Listing and conservation planning. John Donaldson ....
Chapter 3: Character evolution, species recognition and
classification concepts in the Cycadaceae. Ken D. Hill ........
Chapter 4: Morphological characters useful in determining species
boundaries in Cycas (Cycadaceae). Anders Lindström
...............................
Chapter 5: Comments on Cycas, Dyerocycas and Epicycas
(Cycadaceae). Chia-Jui Chen, Ken D. Hill and Dennis Wm. Stevenson
...............................
Chapter 6: Classification concepts in Encephalartos (Zamiaceae).
Piet Vorster ..........................
Chapter 7: Classification concepts in Macrozamia (Zamiaceae)
from eastern Australia. Paul I. Forster ..............
Chapter 8: Classification concepts in Ceratozamia (Zamiaceae).
Loran M. Whitelock .....................
Chapter 9: Relationships and phytogeography in Ceratozamia
(Zamiaceae). Andrew P. Vovides, Miguel A. Pérez-Farrera, Dolores
González and Sergio Avendaño ................
Chapter 10: A morphometric analysis of the Ceratozamia norstogii
complex (Zamiaceae). Miguel A. Pérez-Farrera, Andrew P. Vovides,
Luis Hernández-Sandoval, Dolores Gonzalez and Mahinda Martínez
...............................
Chapter 11: Hypotheses on the relationship between biogeography
and speciation in Dioon (Zamiaceae). Timothy J. Gregory and Jeffrey
Chemnick ..........................
Chapter 12: Molecular phylogeny of Zamia (Zamiaceae). Paolo
Caputo, Salvatore Cozzolino, Paolo De Luca, Aldo Moretti and Dennis
Wm. Stevenson .......................
Chapter 13: Systematics of mesoamerican Zamia (Zamiaceae).
Bart Schutzman ......................
Chapter 14: Zamiaceae of Bolivia, Ecuador and Peru. Dennis Wm.
Stevenson
...............................
Chapter 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 ..............................

Library of Congress Subject Headings for this publication: Cycads Classification

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