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CHAPTER XIII. 



THE AEBOEETUM. 



Definition. — Eecent Introduction. — General idea of Arrangement, 

 Sect. I. Scientific treatment of tlie Arboretiim. — Introductory 

 Eemarks. — Dr. Lindley's Classification of tlie Natural Orders. 

 — Explanations. — Synopsis of Orders and G-enera. — Applica- 

 tion of Priaciples. — Transference of the System to the Ground. 

 Sect. II. Decorative Treatment of tlie ArboretTmi. — Object in 

 view. — Employment of larger Trees. — Lawns. — Surfaces 

 planted. — Evergreens. — Arboretums attached to Private Hesi- 

 dences. — Sites ia. Pleasure-Grounds. 



An Arboretum, as now planted, may be defined to be a 

 collection of hardy trees and sbrubs, arranged according 

 to tlieir natural affinities. The different species and va- 

 rieties are placed together raider the genera, orders, and 

 natural groups to which they belong ; and by this means 

 their resemblances and differences are more easily recog- 

 nized and distinguished — from their being brought into 

 proximity — than they would be in any promiscuous dis- 

 tribution. The affinities to which we have alluded are 

 best preserved when the arrangement adopted is that of 

 some one of the botanical systems constructed on the 

 principle of Natural Orders ; and fortunately these too 



