Vitex agnus castus- 



-Zingiber Vanlithianum 



719 



Vitex agnus castus 68 



— Staudtii (309 

 Viticipremna 237 

 Vitis 141 



— Linsecomii 146 



— vulpina 519 

 Vitladiiiia 566 



— triloba 566 

 Vittaria N. A. 43 



— elongata 34 



— scolopendrium 34 

 Vochysia 305 



— thyrsoidea 317 

 Vochysiaceae 305 

 Volvocaceae 550 

 Volvocales 520 

 Volvox 549 

 Vriesea 313 . 

 Vulpia ligustica 65 



Wahlenbergia 214, 343 



— alboniarginata 336 

 congesta 344 



Waldsteinia 119 



— fragarioides 119 

 Warrea 322 

 Warionia 59 

 Weberocactus 103 

 Wedelia uniflora 268 

 Weinmaunia racemosa 335, 344 

 Weiidlaudia glabrata 86 

 Werckleocereus 103 



Wetria 253 



Wliytockia SmUh N. G. 93 



Wilbrandia villosa 329 



Wilcoxia 102 



Wilniottea 102 



Wissadula periplocifolia 278 



Wolffia 142 



Woodfordia 234 



Woodwardia radicans 17, 23, 24, 34. 85 



Wormia ferruginea 220 



Xanthium 107 



— australe 108 



— chinense 107, 133 



— echinatum 107 



— italicum 107, 133 



— pennsylvanicum 107. 133 



Xantliium speciosum 133 



— spinosum 107, 133 



— strumarium 107 

 Xanthomyrtus 255, 258 

 Xanthoria 3. — N. A. 13 



— sect. Euxanthoria 3 



— seci. Xanthosoleuia Hillm* 3 



— fallax Arn. 5 



— parietina vnr. retirugosa Steiner 

 et A. Zahlbr. 5 



Xanthosoma 299 



Xantliostemon 258 



Xanthoxyluni budrunga 441 



Xerocarpa 237 



Xerochlamys 221, 225 



Xeropliyllum tenax 172 



Ximenesia encelioides 55 



Xylochlaena 221 



Xylographa spilomatica (Anzi) Th. 



Fr. 7 

 Xylolaena 225 

 Xylopleurum roseum 621 

 Xylosma 264 

 Xylothermia 610 

 Xyris 328 



Yolaada Hoehne N. G. 315 

 Yucca 155 



— arborescens 165 



— brevifolia 158 



— filamentosa 449 



— mohavensis 165 



— radiosa 155 



— recurva 569 



— Whipple! 165 



Zaluzianskya 214 

 Zaniia 147 

 Zannichellia 342 

 Zanthoxylum americanum 150 

 Zea 472 



— hirta 277 



— mays 592, 593 

 Zehntnerella 102 

 Zelkova serrata 85 

 Zenkeria Stapfii 233 

 Zephyranthes rosea 446 

 Zingiber Vanlithianum 246 



