86 Eleven^th Annual Repoet 



Trees of Indiana. 



BY CHAS. C. DEAM. 



The number of trees included in this list is wholly arbitrary, the 

 scientific definition of a tree being ignored. All the woody plants 

 of the State that usually attain a diameter of 10-15 cm. (4-6 

 inches) have been included and also a few that rarely attain this 

 size in our area. Alnus rugosa (Alder), which in our area is usually 

 a shrub, is included because it so closely resembles Alnus incana 

 (Tag Alder) that it might be mistaken for it. Forms in our area 

 that rarely attain tree size and are generally regarded as shrubs, 

 such as Euonymus atropurpureus (Wahoo), Rhus species (Sumacs) 

 and Hamamelis (Witch Hazel) have been excluded. Trees intro- 

 duced that have freely escaped and have successfully maintained 

 themselves for many years are considered members of our flora, 

 but horticultural trees which have escaped, such as the apple, pear 

 and plum have been excluded. 



Each tree is considered under the following heads: botanical de- 

 scription, distribution, economic uses and horticultural value. 



Botanic description. — Great care has been taken to avoid tech- 

 nical terms, but occasionally for the sake of precision and brevity, 

 it has proven necessary to introduce them. It is believed, however, 

 that none have been used of which the common school dictionary 

 will not give a satisfactory definition. 



Botanical names are usually pronounced according to the English 

 method of pronouncing Latin. The accented syllables have been 

 marked as follows: the grave C) to indicate the long English sound 

 of the vowel and the acute (') to show the short or otherwise modi- 

 fied sound. 



Some of our trees are easily identified and short descriptions are 

 sufficient, while others, such as the oaks and hickories, are not 

 easily identified and more detailed descriptions are desirable. The 

 descriptions have been based upon characters which are conspic- 

 uous in order that the aid of a microscope or lens would not be 

 necessary. The color, size and measurements are based upon fresh 

 material from mature trees. The measurements are given in the 

 metric system, followed by the English equivalent in paren- 

 theses. The last page is a plate on which the systems of meas- 

 urements are compared. The etymology of such generic names as 



