other irrelevant matter. Although this is sometimes irritating, it has no doubt 

 helped to reduce the price of the book. 



The sequence of the papers in each section is logical rather than strictly 

 chronological. There are a number of papers dating back to the 1920's, 1930's 

 and 1940's, but most date from the 1950's and early 1960's. All papers are in 

 English; journals from a wide variety of countries are represented, several of 

 them not easily accessible to most readers. 



It is not easy to judge the reproduction of the original illustrations, particularly 

 the photographs, but most seem to be well-reproduced. The book has no indexes. 



49 DEVELOPMENT IN FLOWERING PLANTS 



1967 



By J. G. Torrey The Macmillan Comp., New York 



Current Concepts in Biology Series Collier-Macmillan Ltd., London 



192 pp., 66 figs., 6 tbs. Price: 22 s. 6 d. 

 (paper-bound) 



Although this book was written for students, it is very well suited for non- 

 botanists who want to acquaint themselves with the main contemporary problems 

 of plant development. The treatment of the subject is very modern throughout, 

 with much emphasis on physiological mechanisms and only the necessary min- 

 imum of morphology. Basic to much of the discussion are the concepts of genetic 

 regulation and selective gene activation. 



The two opening chapters discuss basic ideas and techniques, the different 

 levels of control in plant development (including a discussion of the main classes 

 of plant hormones), and the basic features of cell structure and cell division. 

 Chapter 3 deals with gametes, fertilization and embryogenesis, and chapter 4 

 with seed germination and dormancy. The ensuing chapters successively treat 

 root development, cell differentiation (with sections on unicellular plants), shoot 

 development, leaf development, the physiology of flowering, and the analysis of 

 flower and fruit development. The final chapter deals with callus studies and 

 tumor formation in plants. 



No literature references are given in the text, but there is a rather long selected 

 bibliography at the end of the book. The illustrations are excellent; all line 

 drawings were made by the same artist and most are redrawn from original 

 research papers; the sources are acknowledged in the captions. The book is 

 concluded by an alphabetical index. 



50 MORPHOGENESIS IN PLANTS 



A contemporary study 

 1968 



By C. W. Wardlaw Methuen & Co. Ltd. 



451 pp., 173 figs., 12 pis. London 



Price: 90s.; $ 14.50 



This is a new, enlarged and completely revised edition (hence the new sub- 

 title) of a book first published in 1952. The major feature of the book is the 



41 



