Literature of North American Systematic Botany 65 



the state of Montana. Although only the new species are fully 

 described, many helpful notes are appended to nearly all species, 

 and the book will repay consultation. 



Torrey, Gray, Bigelow and Newberry's papers in several 

 of the volumes of the Reports of Explorations and Surveys for 

 a Railroad Route from the Mississippi River to the Pacific Ocean, 

 published about 1855, may be consulted with profit when the 

 plants of the general central region from Nebraska and Kansas 

 westward are under consideration. 



Gray's Plants of Texas and New Mexico (Plantae Wright- 

 ianae Te.vano-Neo Mexicanae, 1852-3), and other reports on 

 the Mexican Boundary Survey may be profitably consulted, 

 when the plants of the southwest region are under consideration. 



MANUALS COVERING PARTICULAR REGIONS. 



In the field the forester will have to depend very largely 

 upon the local botanical manuals that have been prepared so as 

 to include the plants of more or less restricted portions of the 

 country. And it must always be remembered that such manuals 

 aim to describe only the plants within certain areas, and that 

 outside of these areas they are less and less usable, just as we 

 get farther away from the borders of the region covered. So 

 the forester in Arizona must not expect to be able to use success- 

 fully a manual designed for the New England or Atlantic Coast 

 states. 



For convenience I shall divide the country into four general 

 regions, namely : I. The North Eastern States ; II. The South 

 Eastern States; III. The Rocky Mountain States; IV. The 

 Pacific Coast States. 



I. THE NORTH EASTERN STATES. 



This area extends east and north from the southwest cor- 

 ner of Kansas. For this region there are three standard manuals. 



Britton's Manual of the Flora of the Northern States and 

 Canada. It includes all of the ferns and flowering plants of 

 Kansas, Nebraska, and the Dakotas eastward to the Atlantic 

 Ocean, and indefinitely northward in Canada. 



Britton and Brown's Illustrated Flora of the Northern 

 United States and Canada (3 vols.) covering the same area, 

 and including the same plants. Each species is illustrated by a 

 small figure in the text. 



