266 



INDEX. 



W 



Walnut, 82. 



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



142, 151, 163, 193, 206, 250. 

 Water lily, 178, 180, 181. 

 Water reservoirs, 206, 208, 209. 

 Weeds, 147. 

 Willow, 35, 243. 

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

 Wings, 112, 115, 116. 



Witch hazel, 118, 119. 

 Woodbine, 61, 63. 



X 



Xerophytes, 168, 193, 208. 

 Xerophytic structure, 207. 



Yew, 42. 



Yucca, 45, 47, 130, 131, 



