380 



ESSENTIALS OF BOTANY 



Water, excretion of, 133-135. 

 Water, movement of, 78-81. 

 Water, relation to germination, 8. 

 Water roots, 31, 32. 

 Water-lily, white, insertion of floral 



organs, *156. 

 Water-lily, white, transitions from 



petals to stamens in, *160. 

 Weapons of plants, 123-125*. 

 Wedge-shaped, App. I, *355. 

 Weeds, 200, 201. 

 Wheat-breeding, 314-316. 

 Wheat-grain, section of, *17. 

 Wheat-rust, type study, 255-259*. 

 Wheel-shaped, *152. 

 Willow, adventitious buds of, 95. 

 Willow, flowers of, 150, *151. 

 Wind-pollination, 168, 169. 



Windsor bean seedling, *6. 



Winged fruits, *187. 



Wings, *150. 



Wood of linden, *73. 



Wood sections, *70, *73. 



Wood, structure of, *73, 74. 



Wood, varieties of. See Timber. 



Wood-cell, *69, *70. 



Work of leaf, 136. 



Xerophytes, 114-118*. 



Yarrow, head of, App. I, *359. 



Yeast fungi, 244-246*. 



Yucca, pollination of, *176, 177. 



Zoospores, *226. 

 Zygospores, *221, *248. 



