640 INDEX 



Woodwardia orientalis, 351, 352 Yeast what is, 98 



Yucca. 62 

 X 



Z 



X-chromosome, 359, 360 



Xeno-parasitism, 343 Zamia, 333, 393, 411, 610 



Xylem, 65 floridana, 404, 407 



y Zea Mays, 62, 85, 123, 299, 562, 563 



Zygospores, 345 

 Yeast, 95, 98, 306 Zygote, 180 



