15 



geologists or inexperienced botanists, and when such records are ques- 

 tioned it is done with a spirit of scientific accuracy. Some of our early 

 authors did not distinguish between cultivated and native trees, which 

 involves the distribution of certain species. 



The habitat of many species is discussed; which suggests forestal, 

 horticultural and ornamental possibilities. Then too, the habitat of a 

 tree, helps to identify it. When associated trees are given, those are 

 enumerated which are characteristic of the species throughout its range 

 in our area and they are arranged in the order of their abundance. 



A county map of the State is included which will assist in finding the 

 range of each species. A forestal area map is also added to visualize 

 certain habitats of the State. 



The range and distribution of the species in the State has been given 

 considerable attention to encourage investigation along this line. 



Remarks. Under this title the economic uses of the trees and their 

 products have been given. In addition horticultural and unclassified 

 information is included. 



Illustrations. All of the illustrations except two are photographic 

 reproductions of specimens in the writer's herbarium. The two draw- 

 ings were used in the first edition. 



About 20 of the photographs were made by Paul Ulman, and the 

 remainder by Harry F. Dietz, who has laboriously tried to obtain good 

 reproductions from the material at hand. 



Explanation of Map of Certain Forestal Areas. In describing 

 the distribution of certain species of trees within the State, it was found 

 convenient to speak of certain forestal areas which are here described, 

 and are illustrated by a map which may be found at the end of the text. 



'Lake Region: The southernmost lakes in Indiana are those located in 

 the southwestern part of Wells County; Lake Galacia about five miles 

 northeast of Fairmount in Grant County; Lake Cicott in Cass 

 County; and Kate's Pond about !}/ miles northwest of Independence 

 in Warren County. Roughly estimated, all of Indiana north of a line 

 connecting these lakes might be considered the lake area of the State. 

 Prairie Area: While the interior of Indiana has quite a few small 

 areas called prairies, the real western prairie did not extend far into the 

 State. The dividing line is very irregular, and several elongated lobes 

 extended farther east than indicated by the map. The larger areas 

 east of the line were the extensive prairie area of the Kankakee Valley; 

 the northern part of Pulaski County; and parts of White and Tippe- 

 canoe Counties. "Knob" Area: This is the hilliest part of the State 

 and is located in the south-central part. It is contained in the un- 

 glaciated portion of the State, and includes the "knobs" of the 

 Knobstone, Chester and Mansfield sandstone areas of Indiana. In 



