INDEX. 



607 



asphodeloides, 467, var. tenax, 



467; gramineutn, 484 setifolium, 

 467. 



Xiphidium, 94. 



Xylophylluin, 211,254. 



Zephyra, 412, charac. of, 495 ; amoena, 



495 ; elegans, 495. 

 Zizyphus vulgaris, var. inermis, 380. 

 Zonotrichia sp. ? near Z. fluviatilis, 8. 

 Zuckertia, 239. 

 Zwingera, (ftnote) 149. 

 Zygadenus, 411, charac. of, 479; brac- 



teatus, 482 ; canadensis, 482 ; chlo- 

 ranthus, 482; commutatus, 482; 

 Douglasii, 480 ; elegans, 482 ; Fre- 

 monti, 480, var. minor, 480 ; glaber- 

 rinius, 479, 480 ; glaucus, 480, 482 ; 

 hybridus, 475 ; japonicus, 473 ; lei- 

 raanthoides, 480; moncecus, 473; 

 Nuttallii, 480, 481; paniculatis, 

 481 ; sibiricus, 483 ; speciosus, 482 j 

 virginicus, 475 ; volcanicus, 482. 

 Zygnemacese, 7. 



Zygogonium Agardhii, var. nigricans, 7. 

 Zy gophyllidia, 251. 



END OF THE SEVENTEENTH VOLUME. 





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