CHAPTER XLVI 



PLANTS FOR USE ON THE OREGON AND WASHING- 

 TON COASTAL PLAIN 



THE planting districts in the northwest are very sharply defined. 

 They include (i) the West Slope; that is, between the coast and the 

 mountains, or west of the Cascade Range, and (2) eastern and central 

 Oregon and eastern Washington; that is, all of the district sometimes 

 spoken of as the Inland Empire where conditions show very marked 

 changes. The following lists of plants apply only to (i), this being 

 all of the territory west of the Cascade Range exclusive of the mountain 

 slopes and known as the Oregon and Washington Coastal Plain. No 

 effort has been made to compile lists for (2) known as the Inland Em- 

 pire. There the rainfall is very much lighter, more snow falls in the 

 winter, and much hotter days prevail in the summer, although the 

 nights are always cool. 



There is also another separate district spoken of as southern Oregon. 

 The elevation here is from one thousand to eighteen hundred feet, with 

 conditions much drier than through the Willamette Valley and all 

 through western Washington. The factor in southern Oregon which 

 appears to control plant growth is water, and if one has plenty of that 

 coupled with a reasonable amount of good soil, normal growth can be 

 developed. 



Even in western Washington and Oregon the days are fairly warm 

 and the nights in most cases are cool. This condition makes itself 

 felt very much in the growth of annual vines, because they do not like 

 the cool nights. 



This entire western country appears to be the natural home for 

 coniferous evergreens and for most of the broad-leaved evergreens. 

 They do wonderfully well all through the northwest, west of the 

 mountains. Portland has become known as the Rose City. It has 

 found one particular thing, however, that is not proving a success. The 

 camellia has been largely planted and is generally proving more or less 

 disappointing. The mountain laurel should probably be placed in the 



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