INDEX 157 



Xanthoxylum 65,141,144,145 Yellow oak 87 



Xylem 5, 11 popular 106 



-wood 96 



Yellow birch 103 Yew 85, 127 



buckeye 107 Yucca 128 



cedar 82, 83 



chestnut oak 88 Zygia 135 



cypress 83 Zygogynum 14 



fir. 78 ZygophyUaceae 135, 139, 143 



locust 91 



