INDEX. 



25S 



Vinca. See ' ' Periwinkle.' ' 

 Vine, 199. 



Violet, 192 ; Fig. 104. 

 Viola, -acesB. See " Violet." 

 Virginia creeper, 171, 199. 

 Vitis. See " Grape." 

 Vitacess. See " Vine." 

 Volvox, 12,20; Fig. 10. 

 VolvocinesB, 12, 19. 



Wall-flower, 192. 



Walnut, 183. 



Wandering-Jew, 157. 



Water fern, 117. 



Water-leaf, 214; Fig. 118. 



Water-lily. See " Nymphsea," 



" Castaha." 



Water-milfoil, 206; Fig. 113. 

 Water mould. See " Saprolegnia." 

 Water net, 24 ; Fig. 11. 

 Water-plantain, 167. 

 Water-shield, 190. 

 Water-starwort, 200. 

 Wax-plant, 220. 

 Wheat, 78. 



Wheat rust, 78, 81 ; Fig. 47. 

 Whitlavia, 214. 

 Wild ginger, 224 ; Fig. 126. 



Wild onion, 230. 



Wild parsnip, 202. 



Willow, 181-183; Fig. 96. 



Willow-herb, 206, 226 ; Fig. 113. 



Wing (of papilionaceous flower), 208. 



Wintergreeu, 211. 



Wolffia, 159. 



Wood. See"Xylem." 



Wood-sorrel, 197; Fig. 107. 



Xylem, 110, 124, 135, 150, 173, 176. 



Yam, 154. 



Yeast, 63, 64; Fig. 37. 



cause of fermentation, 63. 



reproduction, 64. 



systematic position, 64. 

 Yew, 141. 

 Yucca, 153. 



Zanthoxylum. See " Prickly ash." 

 Zingiber, -acese. See " Ginger." 

 Zoology, 2. 



Zoospore, 25, 37, 58, 62. 

 Zygnema, 33 ; Fig. 19. 

 Zygomorphy, Zygomorphic, 164, 215, 

 226. 



