INDEX 



WHIPPLEA 

 modesta 



WYETHIA 

 amplexicaulis 

 helianthoides 

 lanceolata 

 robusta 



XANTHIUM 

 Canadense 

 strumarium 

 spinosum 



XYLOSTEON 

 conjugialis 



206 involucratum 

 206 Ledebourii 



340 Utahensis 



341 villosum 



340 ZANNICHELLIA 

 3JJ palustfis 



337 XEROPHYLLUM 

 337 Douglasii 

 QQ7 tenax 



iil zizia 



28 ? cordata 

 282 



282 



ZOSTERA 



671 



282 

 282 

 282 



latifolia 



672 



marina 



672 



673 



2YGADENUS 



66? 



673 



666 

 666 

 666 

 268 



elegans 

 Douglasii 



66^ 



661 



gramineus 



intermedius 



paniculatus 



664 

 661 

 66i 



venenosus 



664 



268 



