INDEX. 



259 



Deciduous forests, 240. 

 Deciduous habit, 143, 196, 240, 



841. 



Deserts, 221, 222, 223, 255. 

 Desiccation, 194. 

 Desm odium gyrans, $9. 

 Destruction of plants, 148. 

 Diatoms, 174. 

 Dicotyledons, 35, 83, 116. 

 Differentiation, 3. 

 Digestion, 154, 156. 

 Dion sea, 160, 161. 

 Dodder, 106, 107, 157. 

 Dog-tooth violet, 144. 

 Dragon tree, 15. 

 Drainage, 143, 145. 

 Drosera, 158, 159. 

 Drouth, 193. 

 Duckweed, 97, 175. 

 Dunes, 145, 201, 209, 211, 212. 

 Dwarf growths, 203. 



E 



Easter lily, 14. 



Echeveria, 17. 



Ecological factors, 163. 



Ecology, 4, 149. 



Eel grass, 184. 



Egg, 110, 111. 



Elate rs, 118. 



Elatine, 93. 



Elm, 63, 67, 68, 75. 



Embryo, 111, 139. 



Entomophilous, 122, 123. 



Epidermis, 37, 40, 41, 42, 83, 84, 



107, 170, 205, SOS. 209. 

 Epilobium, 112, 113, 128, 135. 

 Epiphyte, 209. 

 Equisetum, 111, 203. 

 Erect stems, 62, 65, 66, 67, 68, 69. 



70, 71. 



Erica, WO. 

 Erythronium, 144. 

 Euphorbia, 204. 



Ferns, 55, 56, 85, 88, 100, 111, 113, 



119. 



Fertilizing, 145. 

 Ficus, 8. 



Figwort, 128, 135. 

 Fireweed, 112, 113, 128, 135, 239. 

 Fittonia, 37, 152. 

 Fixed light position, 197. 

 Flag, 126, 133. 

 Floating stems, 59. 

 Floats, 171, 112, 173. 

 Flowers, 76, 78, 140. 

 Foliage forests, 226, 244. 

 Foliage leaves, 6, 28, 139. 

 Forest clearing, 143, 145. 

 Forests, 190, 226, 240, 245. 

 Fruit, 113, 114, 115, 116, 117, 118, 



119, 120, 121, 122. 

 Fucus, 171. 

 Functions, 3. 

 Fungi, 87, 107, 109, 110. 

 Furze, 205. 



G 



Galium, 121. 



Gamete, 110, 111, 112, 113. 

 Geophilous habit, 55, 56, 73, 74, 

 75, 76, 77, 78, 81, 195, 196, 234. 

 Geotropism, 69, 91, 138. 

 Germination, 111, 138, 139, 140. 

 Gorse, 205. 

 Grape vine, 61. 

 Grass, 187, 197, 216, 236. 

 Gravity, 91. 

 Guard cells, 38. 

 Gymnosperms, 115. 



