982 



INDEX. 



Water-cress (Roripa), 434 



Water-ferns, 135 



Waterleaf-Fam., 673, 918 



Water-milfoil, 615, 916 



Water-plantain, 152, 909 



Water-starwort, 556, 914 



Weather-glass, 653 



Webera (Musci), 64, 94, -97, 113, 123. PI. x 



Wedelia (Comp.), 822 



Weinmannia (Cunon.), 466, 95^ 



Wendtia (Geran.), 536 



Wheat-grass, 245 



Whitlow-grass (Draba), 441 



Whorl-grass (Catabrosa), 216 



Wild-barley, 251 



Wild-rye (Elymus), 252 



Willow Fam., 325, 910 



Willow-herb, 607 



Willugbsea (Comp.), 777 



Wilsonia (Convolv.), 666 



Windmannia (Cun.), -466, 953 



Winter's-bark (Drimys), 6, 419 



Wiry grass (Deschamp.), 199, 947 

 Wolffia (Lemn.), -290 

 Wolffiella (Lemn.), 291 

 Woodsorrel (Oxalis), 537 

 Wormwood (Artemisia), 832 



VANTHIUM (Comp.), 821 

 ** Xeranthus (Portul.), -381 

 Ximenesia (Comp.), -823 

 Ximenia (Olac.), 344 



ARROW (Achillea), 829 





Yerba de Perdiz, 474 

 Yew Fam., 142 



yEPHYRANTHES (Amaryl.), 310 

 Zizaniopsis (Gramin.), 156, 166 

 Zuccagnia (Legum.), 486, 494 

 Zygodon (Musci), 84, in, 122. Plate ix 

 ZYGOPHYLLACE^E, 544, 914 



