348 



INDEX 



Wistaria, 265. 

 Witches'-broora, 60. 

 Wormwood : see Artemisia. 



X 



Xanthium, 279. 



Xerophytes, 319. 



Xylem, 285, 287, SSS, S90, 292, 294. 



Yeast, 62. 



Zanniehellia, 237. 

 Zoospore, 10. 

 Zygomorphy, 228, 

 Zygospore, 15. 

 Zygote, 15. 



THE END 



