INDEX 



691 



Xanthidium, 55^, antilopaeum, $52 

 Xanthoclirous, ^63, 370, tomentosus, 



Xiphopteris Jamesoni, 73, 74, myosur- 

 oides, 74, serrulata, 73 



Xylophacos, 658, 661, ampWoxuSj 662, 

 missouriensis, 661, Uewberryi, 662, 

 Parryi, 662, Purshii, 662, pyg- 

 maeus, 662, Shortianus, 661, 

 uintensis, 662, vespertinus, 662 



Xylopilus, 368, crassus. 



Xylorrhiza Brandegei, 

 ensls, 124 



Xyris Smalliana, 457 



368 



124, colorad 



Zannichellia palustris, 616 



Zephyranthes Atamasco, 454 

 Zygospores of New England desmids, 



223 



