Literature of Xorth American Systematic ttotan\ (>.> 



ing the works here referred to, in order to simplify matters I 

 have placed them under four heads, namely: I. General Works; 

 II. Reports and Monographs; III. Manuals Covering Particular 

 Regions ; IV. Books on Trees Alone. 



GENERAL WORKS. 



Prodromus Syslematis Naturalis Regni Vegetabilis, by A. P. 

 DeCandolle, and later Alphonse DeCandolle, 1824 to 1873: 17 

 volumes. Contains Latin descriptions of all the species of flow- 

 ering plants then known to botanists, from all countries in the 

 world. This is one of the most valuable of all general works. 

 To these volumes must be added the thirteen supplementary 

 volumes by Walpers, and Mueller (Repertorium, and Annales 

 1842-1868) containing thousands of additional descriptions. 

 Here should also be placed the nine volumes of the Monographiae 

 Phancrogamarum, by Alphonse and Casimir DeCandolle, 1878- 

 1896. 



Die Naturlichen Pnanzenfamilien, by A. Engler and K. 

 Prantl, containing German descriptions of the genera of plants, 

 accompanied by excellent figures. Whenever accessible it is 

 always referred to by the systematic botanist. Here I may add 

 a reference to my own Synopsis of Plant Phyla, published in the 

 University of Nebraska Studies, 1907, and containing a re- 

 arrangement of Engler and Prantl's families, but based on that 

 work. 



The Flora of North America, by John Torrey and Asa Gray, 

 was begun in 1838. One volume was completed within a few 

 years and a second was begun, and when about half completed 

 it was discontinued. This work, had it been completed, would 

 have given us a North American manual. The descriptions in 

 this old work are very well drawn up. and even today the book 

 has much value. 



The Synoptical Flora of North America, by Asa Gray, 1878 

 to 1884. This was an attempt by Dr. Gray to continue the work 

 begun so many years earlier in the book just mentioned, but the 

 author's death in 1888 brought it to a close, although a couple of 

 pamphlet additions were brought out by B. L. Robinson under 

 the same title some years later. One who has the earlier Flora 

 of North America by Torrey and Gray, and Gray's Synoptical 

 Flora, with the supplements by Robinson, will find them most 

 helpful in whatever part of the country he may happen to be. 



The Xorth American Flora, published by the New York 



