City Trees. 153 



CITY TREES. 

 By Charles E. Bessey. 



The following list of the trees growing on the University Campus 

 has interest as showing what species may be grown in the heart of a 

 rather smoky city. The Campus is bounded by Tenth, Twelfth, R and 

 T streets, and includes about twelve acres inside of the fence and an 

 acre or two in the "parking space ' between the fence and the curb- 

 stone. The first planting appears to have been of Cottonwoods about 

 thirty-three years ago, since which other species have been added to 

 the present time. Some trees which were on the Campus for a time 

 have disappeared on account of the erection of buildings on the ground 

 where they stood. Thus the Red Elm (Ulmus fulva) and the Chestnut 

 (Castanea dentata) have disappeared within the last few years, along 

 with a number of promising conifers. 



This list is the combined result of the work of a class of ad- 

 vanced botanical students, who did the work last year under my per- 

 sonal direction. It is my intention to continue the work until the list 

 includes all of the species of trees grown in the city. I think, however, 

 that in its present form it will have a considerable value as showing 

 what species do best under the conditions found in this city. 



FAMILY PINACEAE. 

 Pinus L. 



Pinus laricio austriaca Endl Austrian Pine 



Grows very well, and makes a good tree. 



Pinus silvestris L Scotch Pine 



Grows well, but does not make quite as good a tree as the Aus- 

 trian Pine. 



Pinus ponderosu scopulorum Engel Bull Pine 



Looks much like the Austrian Pine, but is far more difficult to 

 grow. 



Picea canadensis (Mill) BSP White Spruce 



Is not very successful in the smoky air of the city. 



FAMILY SALICACEAE. 

 Populus L. 



Popuhis occidentalis Britt Common Cottonwood 



Still growing well, although over thirty years old. 



