38 College of Forestry 



treated in this way. On the upper portion of this street rows 

 of sidewalk trees could be secured if desired, as in type Num- 

 ber III. 



VII. The Potted Tree Type. 



A rather rare and even more unusual form of street plant- 

 ing is that which makes use of trees or shrubs grown in 

 large pots or tubs, the trees so grown being placed 

 either on a central paved parking or on the sidewalks.* 

 This style of treatment is productive of great beauty when 

 used on a high class thoroughfare,! and is well worth 

 while on important avenues where natural tree growth is 

 impossible. This type is suggested for Park avenue from 

 45th to 50th streets where wide, brick-paved central park- 

 ings already exist, and where the street forms the ap- 

 proach to the Grand Central Station. This street with its 

 attractive architecture and the splendid vista termination 

 formed by the station is destined to become a very beautiful 

 and very famous thoroughfare, and the city would be justi- 

 fied in spending considerable money in its horticultural 

 decoration. 



VIII. The Parkway Type. 



Probably the most unusual type of street tree planting is 

 that which makes use of an informal grouping of trees of 

 one or more varieties upon lateral grass parkings with or 

 without informally planted center parkings. This is merely 

 adapting to formal streets the type of planting now used on 

 informal parkways. The value of such a type of planting is 

 purely one of taste and, although somewhat daring, is advo- 

 cated by some authorities. There appear to be no streets in 

 Manhattan which would lend themselves to this form of 

 treatment. 



* Some heat-resisting tree of striking foliage such as the Palm 

 (species suggested Cocos plumosa or Chamerops excelsa) could be used 

 for summer 3 use to be replaced in winter with evergreens (species sug- 

 gested varieties of Thuya occidentalism Thuya orientalis or Juniperus 

 Virciiniana) . The former would be stored in an " orangery " in winter 

 while the latter would be rested in a suburban nursery during the 

 summer. 



t This type of planting has been used very effectively on certain of 

 the Boulevards of Taris, such as the Rue de Rivoli. 



