ISO Rhodora [July 



accordingly authorized another revision, which has been entirely re- 

 written along the general lines of the original edition. The most 

 noteworthy changes observed are (I) the use of the International 

 Code of nomenclature in place of the "American" (2) the substitu- 

 tion in the plates of photographs for drawings. Unfortunately these 

 photographs are of (often fragmentary) herbarium specimens rather 

 than of living plants, and have been executed with a very inferior 

 lens and an inadequate background. 



The present edition includes 131 species, 1!) varieties, and 3 hy- 

 brids, representing 47 genera in 26 families. Crataegus under Kggles- 

 ton's treatment continues to head the list in number of species (22), 

 but several of these are not "trees" in the sense in which that term 

 is restricted elsewhere in the book. The author has included a num- 

 ber of varieties recently proposed by Sargent, but without any great 

 degree of enthusiasm, seeming inclined to regard most of these as 

 not clearly distinguished. The most notable additions to the list 

 of species presented in the former edition are perhaps Xali.r discolor, 

 Primus horiulana, Oxydendrum arboreum and Fraxintu lanceolate. 

 Other additions are mostly the result of new views as to specific lim- 

 its. 



Considerable semi-popular material has found its way into the 

 sections headed " Remarks," as seems inevitable in a work that must 

 run the gauntlet of legislative approval. The key continues to be 

 constructed without regard to Moral characters. The many typo- 

 graphical errors of the previous edition have been in great part elim- 

 inated, and the attempt to indicate derivation of generic names has 

 been wisely abandoned. The book will be of great service to all 

 students of forestry, and is well adapted to the use of pupils in the 

 public schools.— James C. Nelson, Salem, Oregon. 



Vol. 28, no. 970, including pages t21 to 15» ami plate tSl , was issued 

 96 August, 19tl. 



