Index. 



279 



Cuttings, woody plants, 208; to be 

 potted as soon as roots are formed, 

 207. 



Cuttings , leaf, propagation by, 208. 



Cuttings, mallet, 203. 



Cuttings, root, propagation by, 204. 



Cuttings, stem, 202; to make and 

 plant, 203. 



Cutworms, 157. 



Dalmatian insect powder, 159. 



Damage from cold prevented by 

 protecting with non-conducting 

 material, 125. 



Dam ping off, 207. 



Darkening of wood, 121. 



Deflowering denned, 243. 



Defruiting denned, 243. 



Density, pruning for, 248. 



Depth of roots in soil, 75. 



Destruction of terminal buds by 

 cold, 121. 



De-tasseling, 242, 252. 



Devices for transplanting, 235. 



Dew point, how to compute the, 

 129; table for computing, 129. 



Dibber, 235. 



Dicotyledons defined, 36. 



Diffusion, law of, 47. 



Dioecious flowers, 100. 



Disbudding defined, 242; trees, 248. 



Disease defined, 13. 



Distal defined, 79. 



Dodder of clover and flax, 171. 



Domestic plants and animals de- 

 fined, 11. 



Dormant state of protoplasm, 15. 



Drainage promotes soil aeration, 69; 

 required by potted plants, 69. 



Dressing defined, 242. 



Drought causes toughness of plant 

 tissue, 138; cultivation a prevent- 

 ive of, 139; mulching a preventive 

 of, 139; tends to hasten maturity, 

 128. 



Drying kills plant tissues, 140. 



Duration of germinating power, 105; 

 of seed vitality, conditions affect- 

 ing, 106. 



Electric light, use of, in glass 

 houses, 143. 



Elements essential in plant food, 

 44; part played by different, 44. 



Emasculation of flowers, 264. 



Embryo defined, 40. 



Endosperm defined, 40. 



Environment defined, 10; factors of, 

 115. 



Epidermis defined, 48; replaced by 

 bark in older stems. 



Evaporation current, 60. 



Evergreen trees destroyed by un- 

 timely warm weather in spring, 

 116. 



Evolution, theory of, 21. 



Factors of environment, 115. 



Families, how formed, 18. 



Farm manure, 152. 



Fecundation, 98; cross, how accom- 

 plished, 264. 



Feebleness defined, 12. 



Ferns, how grown from spores, 39. 



Fertilization, 98. 



Fertilizer requirements of crops,152. 



Filament, 95. 



Fir tree oil, 163. 



Fibro-vascular bundles, 51. 



Fixing desirable variations, 260. 



Flax, dodder of, 171. 



Flea beetles, 161. 



Flower, 93; certain parts of, often 

 wanting, 96; parts of the, 93; parts 

 of, vary in form in different spe- 

 cies, 96. 



Flower-buds, 86; conditions affect- 

 ing formation of, 89; destroyed by 

 cold, 123; how distinguished from 

 leaf buds, 87; ringing often causes 

 formation of, 92, 253. 



Flowering and fruiting, root prun- 

 ing to promote, 253. 



Flowering, glumes, 97. 



Flowering,pinching to promote,252. 



Flowers, composite, 96; especially 

 sensitive to cold, 123; of the grass 

 family, 97; tend to exhaust the 

 plant, 93. 



Flowers and fruit, obstructing 

 growth current to promote, 253; 

 pruning for, 252. 



Flow of sap in spring, 60. 



