: .//< >///<* n<l N<-/vr>?s._ 127 



iu their use ; but they should not exclude the proper introduction 

 of the deciduous kinds. In this we should, above all, avoid the 

 planting of those that have tracing roots, as they are continually 

 liable to send up shoots, and, if neglected, to overrun the premises, 

 or at best occasion constant care in their suppression. 



507. The planting and removal of trees in a cemetery should be 

 wholly under the control of a superintendent or a board, and by this 

 means alone can harmony of arrangement and an agreeable effect 

 be secured. 



508. Upon the grounds of public institutions generally, and in 

 all forms of ornamental planting, there is an additional interest se- 

 cured by the use of exotic and unusual species, provided always 

 that they prove hardy and reliable. In this, the forest flora of 

 Eastern Asia and Japan, from its g'-neral resemblance, yet specific 

 differences, and the forests of the Himalaya region, have furnished 

 many species that deserve to be widely planted, and more generally 

 known. It is not improbable that by this wider diffusion, some 

 species will be noticed that show an uiiexix-eted vigor and suce.-< 

 in growth that may entitle them to notice for planting as timber 

 tree-. 



509. The English elm (Ulmus campextris) appears to be a better 

 tree for cities and smoky villages than our native elms. It will 

 grow on dryer ground and endure a greater degree of drouth. 



CHAPTER XII. 

 \ 



HEDGES, SCREENS, AND SHELTER-BELTS. 



Hedges and Screens. 



510. A hedge is a living fence, generally planted with some thorny 

 tree or shrub, and strong enough to prevent the passing of domestic 

 animals. A screen is more frequently a closely planted wall of ver- 

 dure, generally of some evergreen tree, intended to conceal some 

 unsightly object, or to afford shelter from the winds and protection 

 to gardens, nurseries, orchards, stock-yards, or buildings. They 

 may both be classed among ornamental plantations, and either of 

 them may perform the offices of both. 



511. In no line of planting will there be found so great a variety 

 of opinions with regard to the kinds that should be planted, and as 



