348 INDEX 



Wistaria, 265. 

 Witches'-broora, 60. 

 Wormwood : see Artemisia. 



Xanthium, 279. 



Xerophytes, 319. 



Xylem, 285, 287, 288, 290, 292, 294. 



Yeast, 62. 



Zannichellia, 237. 

 Zoospore, 10. 

 Zygomorphy, 228, 

 Zygospore, 15. 

 Zygote, 15. 



(7) 



TH E END 



