370 



ESSENTIALS OF BOTANY 



Dahlia, thickened roots of, 33, *34. 

 Daily movements of leaves, 108, 



*109, *110. 

 Dandelion, *55. 

 Datura, stigma of, *164. 

 Deciduous, 141. 



Defenses against animals, 122-126*. 

 Definite annual growth, 54. 

 Dehiscent fruits, 185, *186, *187, 



*194. 

 Deliquescent trunk, 53. 

 Dentate, App. I, *357. 

 Descent of water, *70, 80, 81. 

 Desmids, *219. 

 Destruction of plants, 203. 

 Determinate inflorescence, App. I, 



361. 

 Deutzia leaves, *108, *109. 

 Diadelphous, 153, *155. 

 Diagrams, floral, *156, *157. 

 Diatoms, *219, 235-237. 

 Dichogamy, *175, 176. 

 Dicotyledonous plants, 28, 211. 

 Dicotyledonous stem, annual, gross 



structure of, 67, *68. 

 Dicotyledonous stem, cross-section 



of, *68, *70, *72, *73. 

 Dicotyledonous stem, minute struc- 

 ture of, *69. 

 Dicotyledonous stem, rise of water 



in, 78-80, *81. 

 Dimorphous flowers, *178. 

 Dioecious, *140. 

 Discharge of pollen, *162. 

 Diseases, varieties resistant to, 322, 



323. 

 Dispersal of seeds, 191-199*. 

 Distinct, 151. 

 Distribution of material in mono- 



cotyledonous stems, 66, 07. 



Division of labor, 304-308. 

 Dock fruit, study of, 183, 184. 

 Dodder, 32, *33. 

 Dormant buds, 95. 

 Double flowers, 160. 

 Drosera, *119, *120, *121. 

 Drought, endurance of, 115. 

 Drought-plants, 114. 

 Dry fruits, 187. 

 Duct, *69, *70, 78. 

 Dyes, 339. 



Earliest plants, 255, 256. 

 Ecology, 2, 105-125*, 168-180* 



191-199*. 

 Egg, osmosis in, 45, *46. 

 Egg-cell, 165, *166. 

 Elaters, 288, 291. 

 Elliptical, App. I, *355. 

 Elm bud, *92. 

 Elm fruit, *187. 

 Elm leaf, 97, 98. 

 Elm twig, *92. 

 Emarginate, App. I, *356. 

 Embryo, 5, 14. 

 Embryo sac, *166. 

 Endosperm, *13, 14, *17. 

 Energy, source of, in plants, 140, 



141. 

 Epidermis of root, *36, *37. 

 Epidermis, uses of, 131, 132. 

 Epigynous, *156. 

 Epipetalous, 155, *156. 

 Equisetum, type study, 287-290*. 

 Essential organs, *148. 

 Euphorbia splendens, *125. 

 Evergreen, 141. 

 Evolutionary history of plants, 295- 



305*. 

 Excretion, 44. 



