INDEX 



Walnut, introduced into China from Per- 

 sia, 22; character of the bark, 32; fall 

 colouration of leaves, 39 



Walnut, Black, valuable timber tree, 180 



Walnut, Californian, 180 



Walnut, European, improved by selection, 

 175, 178; most important of nut-trees, 

 176; hybrids of, 179, 181 



Walnut, Formosan, 180 



Walnut, Japanese, an important nut-tree, 

 179 



Walnut, Texan, 180 



Webb, Philip Barker, obtains specimens of 

 Atlas Cedar in Tangier, 88 



Willow of Babylon, history, 227; native of 

 China, 232; first mention of in Europe, 

 234; hybrids of, 23G; use in landscape 

 planting, 237 



Wren, Sir Christopher, plants avenue of 

 Horsechestnuts in Bushey Park, 117 



Yew, among earliest forms of tree vegeta- 

 tion, 10; of historical importance, 99; in 

 ornamental gardening, 104; geological 

 antiquity, 106; American and Asiatic 

 speoies, 107; specimens in the United 

 States, 110 



Yew, Canadian, 107 



Yew, Chinese, 108 



Yew, European, 108, varieties of, 112 



Yew, Florida, 107 



Yew, Himalayan, 108 



Yew, Irish, of fastigiate form, 249 



Yew, Japanese, habitat, 107, 111; in Amer- 

 ica, 110; Japanese, upright form of, 

 originating in nursery of Isaac Hicks 

 & Son, 250 



Yew, Mexican, 107 



Yew, Western, 107 



Zizyphus saliva, 223 



278 



