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The Anatomy of PalmsArecaceae - Palmae$
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P. Barry Tomlinson, James W. Horn, and Jack B. Fisher

Print publication date: 2011

Print ISBN-13: 9780199558926

Published to Oxford Scholarship Online: May 2015

DOI: 10.1093/acprof:osobl/9780199558926.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 17 January 2022



(p.65) Chapter 8 Spines
The Anatomy of Palms

P. Barry Tomlinson

James W. Horn

Jack B. Fisher

Oxford University Press

Palm spines are restricted to certain taxonomic groups and so have systematic or diagnostic significance. But within this broad distinction there is great diversity in the kinds of spines that palms produce, these kinds then often having restricted distributions. In principle, however, spines are sclerotic, in order to maintain their rigidity, without regard to original anatomical features. Spines may have a superficial origin, or develop from internal tissues by breakdown of surrounding less resistant tissue; root-and rootlet-spines have internal origins because endogenous development is a root character. This chapter presents a synoptic key that provides a guide to palm spine morphology. It is followed by a listing of spine types in different taxonomic groups with some anatomical examples.

Keywords:   palms, spines, vegetative anatomy

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