8 CONTENTS 



pressure or root pressure. 117. Budding. 118. Grafting. 119, 120. Prun- 

 ing. 121. Girdling. 122. Repairing wounds. 123-127. Turgor . 109-141 



XII. LEAVES. 128. Leaves (parts). 129, 130. Leaves (gross structure). 

 131, 132. Leaves (sap flow). 133-135. Leaves (effects of light). 136-144. 

 Leaves(transpiration). 145. Leaves (excretion of oxygen). 146. Stomata. 

 147. Cells. 148-150. Leaves (photosynthesis). 151. Leaves (effect of clos- 

 ing the stomata). 152, 153. Leaves (respiration). 154. Leaves (fall of 

 leaves) 142-172 



XIII. PLANT IRRITABILITY. 155. Phototropism or response to light. 156, 

 157. Sleep of plants. 158-161. Response to contact . . . 173-179 



XIV. FLOWERS. 162. Flower structure. 163-164. Sex organs of flowers. 

 165. Pollen. 166-169. Pollination 180-196 



XV. SPECIAL EXERCISES ON TYPICAL FLOWERS. 170. Trillium. 171. Iris. 

 172. Evening Primrose. 173. Buttercup or Anemone. 174. Strawberry, 

 Geum, or Potentilla. 175. Mustard or any other crucifer. 176. A Lily or 

 Amaryllis. 177. Jack-in-the-Pulpit or Skunk Cabbage. 178. Lilac, For- 

 sythia, or Privet. 179. Sweet Pea, Locust, or Lupine. 180. Violets. 

 181. Toad Flax or Butter and Eggs. 182. A Mint. 183. The Sunflower, 

 Asters, or Goldenrod. 184. The Dandelion, Chicory, or Hawkweed. 

 185. Indian Corn 197-21!) 



XVI. EXPERIMENTS WITH FLOWERS. 186. Function of the perianth. 

 187. Effect of light. 188. Effect of heat. 189. ReSj iration of flowers. 

 190. Flowers give off heat 220-223 



XVII. TYPICAL FRUITS. 191. Core fruits. 192. Stone fruits. 193. Pulpy 

 fruits. 194. Dehiscent fruits. 195, 196. Seed dispersal. 197. Sap flow in 

 fruits 224-232 



XVIII. CRYPTOGAMS. 198. Algae. 199. Reproduction in pond scum. 

 200. Pleurococcus. 201. Vaucheria or green felt. 202. Bread mold. 

 203-207. Molds. 208, 209. Fungi. 210. A moss plant. 211. Mosses. 

 212, 213. A fern. 214. Yeast and fermentation. 215-220. Yeast. 221- 

 225. Bacteria. 226-228. Protoplasm 233-269 



