INDEX 519 
1953-1955 
x 
Wulfenia, 437 
Yarrow, 438; see also Achillea millefolium 
xX 
Z 
Xanthoxylum americanum, 432 
Xyloterinus politus (associated with oak wilt), : 
297, 305-6 Zizia aurea, 421, 434 
