PREFACE 



THIS book is an outgrowth of courses in plant anatomy offered 

 at the University of Chicago since 19x7. Much valuable 

 anatomical w^ork has been done in the form of monographs 

 on specific plants, special studies of restricted scope, general 

 studies of organography, and in studies incidental to research in 

 physiology, pathology, pharmacology, and other fields of plant 

 science. Discussions w^ith those interested in applied botany, 

 research workers and students, suggested the desirability of pre- 

 paring a work which would bring together some of these investi- 

 gations relating to the structure and developmental anatomy of a 

 number of economic plants. In this book, the available data have 

 been freely drawn upon, and at the conclusion of each chapter 

 there is appended a selected list of citations from which material 

 has been obtained. There has been no attempt to compile a com- 

 plete bibliography, but the selections have been made that more 

 detailed information on special phases of plant anatomy may be 

 readily available. In many instances, the citations listed have 

 extensive bibliographies. 



The book has been organized in two parts, the first dealing with 

 general plant anatomy, the second with the structure of a selected 

 number of economic plants. In Part I, the point of view of develop- 

 mental anatomy has been presented briefly, together with the 

 nomenclature which is used in Part II. Since nomenclature is 

 frequently inconsistent, a glossary defining the terms in the sense 

 in which they are used in this work is appended. The intro- 

 ductory chapters are intended to supplement other works on 

 anatomy and to make this work more generally useful. 



In Part II, it was obviously impossible to consider a large number 

 of plants in as great detail as the amount of material available and 

 the usefulness of such material to investigators would warrant. 

 The problem of which to include and which to omit presented 

 a real difficulty. The principal criteria determining the selection 

 were the economic importance of the plant, its suitability as a 

 representative of the family to which it belongs, and the intricacy 



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