LIST OF ILLUSTRATIONS 



XXV 



XX. An effective combination of stone work and of plantings in an informal 

 lawn area. Varieties of stonecrop, moss pinks, and Scotch pinks lend 

 charm to an otherwise uninteresting mass of stone. (See Plate No. 

 LIH, Page 334, for lily planting shown in background of this picture.) 126 



XXI. An uninteresting rocky slope often can be turned into an attractive 

 landscape feature through the careful selection and planting of plants 

 adapted to light, sandy soils. This slope is covered with a grouping 

 of hardy pinks, evergreen candytuft, saxifrage, and tufted pansy . 127 



XXII. To develop a successful rock garden, not only must the stones be well 

 placed, but the plants must be selected to produce an effect in keeping 

 with the scale of the garden; otherwise the effect will be that of a 

 collection of stones which overpower the garden picture, as shown 

 above 142 



XXIII. To few of us does the term "wall garden" convey a definite im- 

 pression. Yet how frequently the opportunity comes, even in a small 

 way, to change a wall of rock to a wall of flowers and foliage. In 

 this photograph we see Scotch pinks, creeping phlox, golden tuft, 

 tunica, and other similar plants used to excellent advantage . . 143 



XXIV. An interior view of a pleached allee eight years after transplanting. 

 Note the spacing of the larger plants of the European cork maple 

 at intervals of three feet, with "fillers" between each two of the 

 larger trees. Compare with Plate No. XXVII on Page 175 for the ex- 

 terior view. Openings have been cut in the top of this allee to pro- 

 duce interesting spots of sunlight on the walk 158 



XXV. An excellent illustration of pleasing garden formality filled with box- 

 wood hedges, as edgings for carpet plantings of Japanese spurge, and 

 accented with specimens of California privet neatly trimmed in a 

 pyramidal form to represent boxwood 159 



XXVI. The use of bay trees in tubs is required in many of the northern gar- 

 dens to produce accent points often at spots where no permanent plant 

 can be planted in the ground. These trees are stored in cool green- 

 houses during the winter months 174 



XXVII. A pleached allee may form jiot only a most interesting feature as 

 XXVIII. 



shown on Plate No. XXIV, Page 158, but this one serves as a solid 

 screen between the lawn area and the service buildings .... 



175 



This open allee is framed on either side by a solid row of closely 

 sheared thorn trees. Its formal lines are softened by the row of pink- 

 flowering dogwoods which add a charm of flowers in early spring and 

 of fruit in the late fall. Thorns planted four to five feet apart and 

 dogwoods eight feet apart. Width between rows of thorns twenty- 

 two feet and between rows of dogwoods nine to ten feet. (See ex- 

 planation of measurementsxm Page 144) 190 



XXIX. An open allee twelve feet wide and eight hundred feet long, developed 

 by the use of white birch planted three to four feet apart in each row. 

 For a permanent allee of this type the birch is not ideal because of its 

 short-lived characteristics and susceptibility to borer. Thorns or the 

 European beech would be preferable . 191 



XXX. A group of Japanese snowball, producing flowers in spring soon after 

 the leaves appear, adds much to the attractiveness of a landscape 

 picture . . ..... . ; i. . ; ^ :, .- v i v . , . . . . 206 



