INDEX. 



585 



XiJouifei's, method of grafting, 322 



method of striking, by cuttings, 



297 

 that are grafted, generally worth- 

 less, 847 

 Confervae, freshwater, evidence of vital 

 force in, 10 



motionin, stopped 



by iodine, 1 

 Corbeil's, M., method of inarching the 



branches of the pear-tree, 323 

 Corme, 43 

 Corolla, its situation and colour, 81 



its use, 95 



Cortical integument, 39 

 Cotyledons, 16 



supply nourishment to the 



plumule, 16 

 Cree's method of pruning forest-trees, 401 

 Creepers, 428 

 Crops, change of, 433 

 Cross-breds, 96 



' in general are papable of pro- 

 ducing fertile seed, 96 



' in general assimilate naore to 



the male than female, 495 

 Cross-breeding, 488 



differs from muling, 488 



experiments in, 489, 496 



practical instructions for, 



490 



precautions to be taken 



in, 494, 498 



will take place as readily 



among plants as ani- 

 mals, 498 

 Crown-grafting, 315 



Cryptogamio plants, phenomena of repro- 

 duction, 11 

 Cucumbers, advantage of growing, in 

 forcing houses in winter instead of 

 pits, 218 

 Currant-bush, pruning of, 393 

 Curl in potatoes, 99 



Cuttings, amount of heat necessary for 

 the striking of different 

 species, 290 



application of collodion to, 



294 



best kinds of soil for stiiking, 



287 



bottom-heat a fundamental 



requisite, 291 



conditions required in order to 



enable them to become 

 young plants, 2^5, 293 

 double bell-glasses for, inju- 

 rious, 296 



' double pots employed in 



striking, 288 



Cuttings, evil of the soil in which they 

 are placed being kept too 

 wet, 293 



importance of their ends touch- 

 ing the bottom of a pot, 286 



in what respect they differ 



from seeds, 269 



M. Delacroix's method of 



striking, 296 



mode of preparing, 298 



mode of striking, in phials of 



water, 297 

 necessity for a due adjustment 



of heat, light, and moisture, 



in the striking of, 289 



necessity for the shading of, 291 



of succulents, mode of treating, 



294 



packing of, 255 



propagation by, 281 



singular phenomenon with 



respect to the striking of, 295 

 the most favourable time for 



striking of, 282 

 their power of rooting always 



greatest when they begin to 



push, 292 

 Cytoblast, or vital centre, 7 



D'Albket's practice of budding, 309 

 practical directions for graft- 

 ing, 325 

 Damping off, 212 



Dampness, excess of, indispensable to 

 plants in a state of rapid 

 growth, 211 



of glass-houses, 205 



Darkness favouraUe to the production of 



roots, 25 

 Daubeney, Dr., his experiments on the 

 power of plants to se- 

 lect their food, 27 



experimentson the effect 



of coloured light on 

 plants, 300 

 Debility brought ou by high tempera- 

 ture, 107 



propagation by division, not a 



cause of, 269 



secures permanence in some va- 



rieties of plants, 467 



Decaisue, M., his experiments relative to 

 the production of colouring matter in 

 madder, 300 



De Candolle, M., laws of temperature 

 with respect to its influence on vege- 

 tation, 113 



Deciduous cypress, great extension of its 

 root in search of water, 19 



plants, 79 



