100 LANDSCAPE GARDENING 



interest that will never be lost, although it will 

 progress through leaf, blossom, fruit, and twig, 

 from one phase to another as the seasons change. 



The seasonal development of a shrub causes it 

 to vary its color in a regular progression, moving 

 its dominant color note through a sort of cycle of 

 changes. Plants differing widely in spring foli- 

 age approach a standard green in late summer, to 

 become again diversified in the autumn. This 

 may be called " color rotation." 



While plant color is largely green, this green 

 will incline somewhat toward one of the primaries, 

 so that, regardless of species, plants may be 

 grouped under red, blue, yellow, and even purple 

 greens. This modifying element of the plant 

 green will appear most strongly at the beginning 

 and the end of the plant's yearly growth, for dur- 

 ing the summer season there is little variety in 

 plant greens (Fig. 20). The Japanese barberry, 

 for example, sends forth reddish buds, which grad- 

 ually turn into the dark, dull green of high sum- 

 mer; then it begins another change toward the 

 brilliant red of its autumn foliage. There has 

 been a progression or rotation from red through 

 green and back to red again. The Viburnum lan- 

 tana, or wayfaring tree, has a rotation from pur- 



