INDEX 



215 



Fruits, 67, 69, 155. 

 Functions, 21, 22, 23. 



of roots, 24. 



of leaves, 58. 



of stems, 93, 96. 

 Fungi, 47, 48, 77, 104, 111. 



Gametes, 142-144. 

 Gametophyte, 143-145. 

 Gas, 120. 



Gases used by plants, 57. 

 Gemmse, 138. 

 Generations, 7, 141-145. 

 Georgia oak, 130. 

 Geotropism, of roots, 4, 38, 39. 



of leaves, 74. 



of stems, 74. 

 Girdling, 103, 104. 

 Glands, 79. 

 Gleditschia, 123. 

 Grafting, 177, 178. 

 Grape, 95, 105. 



Gravity, influence upon roots, 39, 

 40. 



upon leaves, 74. 



upon stems, 128, 129. 

 Growth of roots, 49. 



in darkness, 63, 65, 122. 



of leaves, 87. 



of stems, 108, 109, 111. 

 Gum arabic, 44. 



Hairs, 71, 84. 

 Heliotropism, 73. 

 Hemlock, 198, 200. 

 Hibernacula, 119, 120. 

 Hickory, 110, 198. 

 Holdfast, 26, 153. 

 Honey, 78, 202. 

 Honey locust, 123. 

 Hop, 126. 



Horse-chestnut, 86. 

 Horse radish, 133. 

 Humus, 37, 38. 



Hyacinth, 25, 28, 121. 

 Hyacinthus, 27. 

 Hydrogen, 16, 18, 64, 183. 



Indian pipe, 47, 77. 

 Insects, 151, 152. 

 Iodine, 16, 19, 167. 

 Ipomea, 49. 

 Iris, 56. 

 Iron, 16. 

 Iron chloride, 18. 

 Ironweed, 205. 

 Ivy, 65, 86. 



Jack-in-the-pulpit, 27, 121, 123, 140. 



Lamina, 54, 72, 73, 81, 85, 86. 



Laminaria, 26. 



Larkspur, 95, 148. 



Leaf mosaic, 72. 



Leaf traces, 95. 



Leaves, 12, 54-92, 123, 179, 180. 



Lemna, 30. 



Lichens, 207. 



Life, length of, 112, 113, 114, 115, 



131, 155. 

 Light, influence upon roots, 40. 



upon chlorophyl, 61-63. 



relation to plant, 61, 195, 196. 

 Lily, 135, 148. 

 Line, 14, 16. 

 Liquid air, 185. 

 Liquid hydrogen, 185. 

 Liverworts, 50, 80, 136, 193, 200. 

 Loosestrife, 135. 

 Lunularia, 138. 



Maize, 165-172. 



Mangrove, 29. 



Man of the earth, 49. 



Maple, 3, 4, 6, 19, 68, 81, 86, 95, 



96, 101, 105, 198. 

 Marchantia, 51, 55, 136, 138. 

 Meadow garlic, 135. 

 Meadows, 204. 



