474 



INDEX. 



spinosum, 253. 



strumarium, 252. 

 Xantlio, 324. 

 Xanthocephalum, 53, 114. 



Benthiuiihuiuni, 114. 



gvmnospernioides, 114. 



sericocarpum, 114. 



Wrightii, 114. 

 Xanthocoma, 114. 

 Xinienesia, 288. 



enccUokh'S, 289. 

 Xyhirrliiza fjlabriuscula, 200. 



vtllosa, 200. 

 Xylosteon, 14. 

 Xijlosteum ciliatum, 16. 



inrolucraium, 16, 

 obldnyifolium, 15. 

 Solonis, 15. 

 Tartaricum, 15. 

 villosum, 15. 



Yarrow, 363. 

 Yuungia pyrjmma^ 431. 



Zexmenia, 67, 285. 

 brevifolia, 286. ■ 

 liispida, 286. 

 hlqwMa, 289. 

 podoce|ihala, 286. 

 Texana, 286. 



Zinnia, 63, 253. 



acerosa, 254. 



anoniala, 253. 



bicuspis. 253. 



granditlora, 253. 



intermedia, 253. 



jiiniperifolia, 253. 



leptopoda, 253. 



mullijlora, 253. 



pauciflora, 253. 



pumila, 253. 



revolutii, 253. 



icnuifiora, 253. 

 Zinnie.e" 63. 



University Press: Jobn Wilson Is Son, CauibriUge. 



