DiriSIO^- OF HORTICULTURE 543 



SESSIONAL PAPER No. 16 



In round numbers, about four thousand varieties of ornamental trees and shrubs 

 liave been tested in the Arboretum, and on the ornamental grounds at the Central 

 Farm at Ottawa. While many of these are not hardy enough for general recommenda- 

 tion, a great number of those tested have been found to be very useful and attractive. 

 From among that number, those in the following lists are selected and recommended 

 for certain special purposes. Inquiries with regard to trees and shrubs for such pur- 

 poses are very frequently made at the Farm. 



SOME REASONS FOR GROWING ORNAMENTAL TREES AND SHRUBS. 



A beautiful tree is one of the most beautiful things in all God's creation. 



Trees around the home give pleasant shade, and on hot days, moderate excessive 

 temperatures by means of transpiration. 



Trees around the home make pleasant contrast with the straight architectural 

 lines of the house, and often add an unconscious charm to the home. 



Trees around the house break the force of windstorms, and often protect it from 

 injury. 



Shrubs may be grouped into picturesque masses, may be used to screen unsightly 

 buildings, or planted to soften harsh boundary lines. 



Shrubs are ornaments in the out-of-door room, which last for many years, and 

 receiving a little attention, grow into a beauty of perfect form and fitness. 



Shrubs are beautiful and oftimes fragrant in time of flower, clean and attractive 

 ,'n foliage, and their fruits are often the winter food for our bird friends. 



The cost of a tree or shrub .spread over the long years of its life, during v.-hich it 

 ministers to our higher senses and love of the beautiful, is often less than the cost of 

 one meal. 



The worth of trees and shrubs is the worth of subtle influences, directing life's 

 motives into channels leading from the brute towards the Creator. 



GOOD STREET OR AVENUE TREES. 



American Elm (Ulmus americana). — The best of the larger quick-growing hardy 

 trees for wide streets or avenues. 



Ba>iSwood, or Linden {Tilia americana or Tilia PlatypJtyllos). — Both the Ameri- 

 can and the broad-leaved European varieties make useful trees for either avenues or 

 streets. 



Maple, Sugar, or Bode Maple (Acer saccharum). — One of the best known, popu- 

 lar and most useful trees for street planting. 



Maple, Norway (Acer platanoides). — This maple does not grow so large as the 

 sugar maple, but forms a round-headed symmetrical tree, hardy and attractive. 



Oak, Bed or Scarlet (Quercus ruhra and coccinea). — The oaks,, although of 

 slightly slower growth, make good avenue or street trees. The red and scarlet are the 

 best. 



ADDITIONAL TREES USEFUL FOR STREET OR AVKMK I'LANTING. 



Green Ash (Fraxinuf) pennsylvanica lanceolala) (viridis). 



Red maple (Acer ruhrum). 



Pin oak (Quercus palustris). 



Carolina poplar (Populus deltoides). 



Maiden-hair tree (Ginhgo hiloha). 



Sycamore (Platanus occiden.talis and orientalis). 



White a'^h (Fraxinus americana). 



Ottawa. 

 16— SHi 



