218 



INDEX 



Utricularia, 66, 78. 



Vallisneria, 208. 

 Vaucheria, 210. 

 Vegetative reproduction, 132, 133, 



139. 

 Velvety surfaces, 85. 

 Violets, 4, 5, 6, 85. 

 Virginia creeper, 66. 



Walnut, 4. 

 Water cultures, 15. 

 Water hyacinth, 30, 43, 208. 

 Water, in plants, 10. 



in leaves, 81. 



in protoplasm, 90. 



Water transpired, 82, 83, 84, 85. 



Water lily, 120, 208. 



Wax, 84, 176. 



Weeds, 125. 



Wheat, 7, 155. 



White surfaces, 61. 



Wild garlic, 135. 



Wild onion, 136. 



Willow, 15, 41, 55, 132, 207. 



Wilting, 33, 34, 88, 97. 



Wind, 150, 196. 



Winter buds, 119, 120. 



Witch-hazel, 203. 



Wood, 98, 99. 



Xanthium, 171-175, 



