INDEX 



157 



Xanthoxtlum . . . .65, 141, 144, 145 

 Xylem 5,11 



Yellow birch 103 



buckeye 107 



cedar 82, 83 



chestnut oak 88 



cypress 83 



fir 78 



locust 91 



Yellow oak 87 



popular 106 



-wood 96 



Yew 85, 127 



Yucca 128 



Zygia 135 



Zygogynum 14 



Zygophyllaceae 135, 139, 143 



