140 THE PLANT WOELD 



Then follows a description of the gall, its time of occurrence and miscel- 

 laneous notes. The half -tone plates representing the "galled" plants 

 give a fair idea of their general appearance. The descriptions of the 

 insects producing the galls are very few and meagre, while illustrations 

 of them are almost entirely wanting. The author seems to regard the 

 subject rather from the standpoint of the collector of museum curiosities 

 than from a strictly scientific point of view. A work describing and 

 illustrating our American galls would be a very desirable addition to our 

 literature and would prove useful to phytopathologists. C. L. S. 



Cyclopedia of xAmerican Horticulture. By. L. H. Bailey. New York. 

 The MacMillan Co., 1901-1902. Vol. 1, A. D., pp. XXII + 510. 

 Pis. 9, figs. 743 ; Vol. 2, E. M. Pp. XIV + 511-1054. Pis. 10-19, 

 figs. 744-1453; Vol 3, N. Q. Pp. XV + 1055-1486. Pis. 20-30, figs. 

 1454-2059 ; Vol. 4, E. Z. Pp. XXX + 1487-2016. Pis. 31-50, figs. 

 2060-2800. 



This important work has been reviewed from time to time in these 

 columns as the various parts have been issued ; but its completion war- 

 rants an additional notice. It is the first comprehensive American 

 cyclopedia of horticulture, and as such commands the attention of all 

 students and professional men. Its value to the horticulturist is obvi- 

 ous ; to the botanist it is essential on account of the descriptions of 

 numerous genera and the attempted systematic arrangement of species. 

 We use the word "attempted" arrangement, because in the case of 

 many genera such as Tidipa and Gladiolus, the species originally exist- 

 ing in nature have become so confused by artificial hybridization that it 

 is difiicult to present them in proper taxonomic form. The articles have 

 been largely prepared by specialists, whose names or initials are 

 appended, so that the blame for such errors of treatment as exist does 

 not necessarily fall on the editor. More than 450 persons have thus con- 

 tributed, and the number of articles reaches the enormous total of 4,357, 

 in the course of which over 2,000 genera and about 24,000 species are de- 

 scribed. The illustrations are uniformly good, and are so arranged that 

 at least one will be found wherever the book is opened. 



The editor has been conservative in the matter of nomenclature, 

 which is perhaps wise so far as the treatment of species is concerned ; 

 but it is to be regretted that in names of genera the rule of priority was 

 not more rigidly observed. 



In the preparation of bibliography, indexes, etc.. Professor Bailey 

 has been assisted by Mr. Wilhelm Miller, whose tasks have been most 

 conscientiously performed. The work is remarkably free from typo- 

 graphical errors, and it may be recommended, unreservedly, we think, 

 as the best of existing horticultural encyclopedias. C. L. P. 



