288 



INDEX 



Coldframe, 199, (lab.), 283. 

 Cold pit, 200. 

 Composite flowers, 91. 

 Copper sulfate, 181. 

 Corm, 195. 

 Corolla, 88. 

 Cotyledons, 28. 



Cracking, of fruits and vegetables, 

 132. 



of seed case, 22. 

 Crop rotation, 151. 

 Crossed seedlings, selection of, 273. 

 Crosses, 12, 269. 



after-care of, 272. 

 Crossing, chance, 273. 



preparations for, 270. 

 Cross-fecundation, 270. 

 Cross-pollination, 93, (lab.), 285. 



advantages of, 94. 

 Crown, division of, 192. 

 Cultivation, of soil, 135. 



to induce variations, 268. 

 Culture, 4. 



of plants, 2. 

 Curculio, 171. 

 Cuticle, 41. 

 Cuttings, 107, 196. 



autumn planting of, 206, 207. 



characteristics of, 197. 



conditions favoring growth of, 

 197. 



dormant, 204. 



green, 209, 211. 



influence of air temperature on, 

 198. 



mallet, 207. 



of evergreen plants, 205. 



of leaf, 212. 



of root, 208. 



of stem, 206. 



parts used for, 197. 



"saucer system" for, 211. 



storage of, 205. 



with heel, 206. 



Damping-off, affecting green cut- 

 tings, 211. 

 De-flowering, 249. 

 De-fruiting, 249. 



De-tasseling, 249. 



Density, pruning for, 254. 



Depth, of planting seeds, 30, 187. 



of roots, 69. 

 Development, abnormal, 139. 



of fruit, 96. 



of leaves, 76. 



Dew-point, computing of, 123. 

 Diameter of stems, increase of, 47. 

 Dibber, 241. 

 Di-cotyledons, 28. 

 Diffusion, 39, 40. 

 Dioecious flowers, 94. 

 Disbudding, 249. 

 Disease, 6. 



control, 175. 



in cuttings, 211. 



resistance, 182. 

 Diseases, non-parasitic, 182. 



preventable by spraying, 179. 

 Distance of planting, 76. 

 Distribution of food materials, 39. 

 Division, propagation by, 188. 

 Dodders, 174. 



Domestic plants and animals, 3. 

 Dormant buds, 80. 

 Dormant plants, propagation by 



cuttings, 204. 

 Dormant protoplasm, 7. 

 Drainage, for potted plants, 63. 



in pots, 243. 



Dressing, of nursery stock, 248. 

 Dropsical condition, 131. 

 Dry soil, 119. 

 Drying, effect on seeds, 102. 



of plant tissue, 136. 

 Duster, 164. 

 Dwarfing, of plants, 145. 



by grafting, 215. 



Elaborated sap, flow of, 54. 

 Electric light, 141. 

 Elements, 37. 



Emasculation of flowers, 271. 

 Embryo, 32, 186. 

 Endosperm, 32. 

 Environment, definition of, 2. 



factors of, 109. 

 Epidermis, 41. 



