ARBORETUMS AND BOTANIC GARDENS 289 



former might be irregular in outline. Perhaps it 

 might cover a series of ridges or hills and its borders 

 might form numerous projections and bays of large 

 extent, giving ideal situations for additional plants. 

 Trees, shrubs, and flowers are growing together in 

 nature and it is, therefore, fitting that they should 

 be associated in plantations made by man. 



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