378 APPENDIX. 



But, in forming avenues, whether gently meandering, or in direct 

 lines, to be perfectly beautiful, to be consistent with nature, and the 

 most consummate modern art, allow uncommon and proportionate 

 width and space ; width also for spacious borders. Set the trees, not 

 in direct or continuous lines, but in irregular clumps ; each clump 

 being either all varieties of the same family, or of the same kind, as 

 nature sows the ground. Clusters of other distinct families, or spe- 

 cies of trees or shrubs, to succeed each other alternately, allowing to 

 each individual tree sufficient space, and leaving distance, or more 

 or less spacious openings between each clump, where the prospect 

 requires. Yet, wherever it is desired to exclude or bound the pros- 

 pect, set each clump or family contiguous, so as even to overlap. 

 For those continuous clumps, the following order of arrangement has 

 been suggested by Mr. London, as appropriate : 1. Oaks, inter- 

 mixed with a few larches ; 2. Chestnuts, and a few pines; 3. Syca- 

 mores; 4. Lindens; 5. Elms; 6. Oaks; 7. Larches; 8. Spruce 

 firs ; 9. Pines ; 10. Beeches. Other and beautiful trees or shrubs 

 may also here find conspicuous space, as clumps of Purple beech, of 

 Scotch laburnum, &c. &c. &c. 



Those marked thus * are evergreens. 



" " " t will admit of frequent repetition. 



" " " jt being very handsome, will admit of very 



frequent repetition. 



" " " S. S. require protection in winter, in north- 



ern climates. 



CLASS I. TREES OF THE TALLEST GROWTH, 



FOR THE FOURTH OR OUTER RANGE. 



1. tfABELE, or SILVER LEAF. Populus alba. 



A tree of rapid growth, rising to a great height ; the leaves are 

 cordate, pointed, of a very dark green above, perfectly white and 

 woolly or downy beneath. The petioles are slender, and, like the 

 aspen, are set in motion by every breath of wind ; and the lively 

 contrast of the upper and under surface gives the tree a striking 

 appearance. It is raised from suckers. 



2. ffAiLANTHUs, or TREE OF HEAVEN. JKlanikus glandulosa, 

 A tree from Japan or China, which there rises to an enormous 



height; with a slender and very straight trunk; the leaves are 

 pinnate, and from three to four feet in length ; the leaflets very 

 numerous and beautiful. An elegant tree of extremely rapid 

 growth. It answers well in the latitude of Boston. It is sometimes 

 called Tallou, or Tillou. It is raised from seeds and from suckers. 



3. (1.) ASH. Fraxinus excelsior. 



A fine, stately tree, which rises to a height of sixty feet, with 

 pinnate leaves. The timber is very strong and compact. Raised 

 from seeds. 



(2.) MASNA ASH. F. rotundifolia. This tree is from Calabria; it 



