X CONTEXTS 



PAGE 



149. Self-pollination 127 



Experiment 4I . Pollination 128 



150. The Period of Flowering 128 



151. Time of Daily Flowering 130 



Experiment J^2. Time of Flowering 131 



152. Fructification 131 



153. Fleshy Fruits 131 



154. Dry Fruits 132 



155. Movements of Fruits 132 



Experiment J^3. Kinds of Fruits 133 



CHAPTER VI 

 ADJUSTMENT TO GRAVITY, CONTACT AND SHOCK 



156. The Relation of the Plant to Gravity 135 



157 . Geotropism 135 



158. Cause and Reaction 137 



159. Region of Curvature 138 



160. Ecological Significance of Geotropism 139 



Experiment 44- Geotropism 139 



161. Response to Contact 1-41 



Experiment J^5. The Behavior of Tendrils 142 



162. Response to Shock 142 



Experiment Jf6. Response to Shock 143 



CHAPTER VII 

 ADAPTATION TO WATER 



163. The Relation of Structures to Water 144 



164. Adaptation to a Small Water Supply 144 



165. Decrease of Water Loss through Leaf Position 145 



166. Decrease through the Rolling of the Leaf 145 



167. Reduction of Leaf or Stem 147 



168. Changes of the Epidermal Cells 147 



169. Modifications of the Stomata 148 



170. Changes in the Chlorenchym 150 



171. Increase and Storage of Water Supply 151 



172. Adaptation to Excessive Water Supply 152 



Experiment Jfl . Experimental Adaptation to Water 153 



173. Types of Plant Body 154 



174. Types Produced by Adaptation to Water 155 



175. General Features of Xerophytes 156 



176. Types of Leaf Xerophytes 156 



177. Normal Leaf Xerophytes 157 



178. Storage Leaves 158 



