264 



INDEX. 



W 



Walnut, 82. 



Water, 90, 92, 94, 95, 113, 138, 



142, 151, 163, 193, 206, 244. 

 Water lily, 178, 180, 181. 

 Water reservoirs, 206, 208, 209. 

 Weeds, 147. 

 Willow, 35, 239. 

 Wind, 95, 98, 114, 122, 167. 

 Wings, 112, 115, 116. 



Witch hazel, 118, 119. 

 Woodbine, 61, 63. 



Xerophytes, 168, 193, 208. 

 Xerophyte structure, 207. 



Yew, 42. 



Yucca, 45, 47, 130, 131, 



