INDEX. 367 



PAGE 



Branches, horizontal, effects of gravitation in depressing them, counteracted by 

 the same agent occasioning the formation of woody matter to be 



greatest on their under side 127 



Branches, their junction with the stem 141 



Budding, union resulting from the operation of 1 02 



of the walnut-tree 231 



Buds, whence generated . 122 



of trees, spring from their alburnum . . . . . . 153 



, their production by roots 121 



under certain circumstances are produced by roots . . . . 156 



, their formation in tuberous rooted plants, beneath the ground . . 104 



, on their reproduction 119 



, their production by the internal parts of tubers ..... 120 



, their reproduction in biennial plants 122 



, existence of numerous latent ones 119 



Bulbous roots 110 



Bulbous-rooted plants 115 



, their leaves and roots first produced in spring are derived 



from sap generated in the preceding season . . . . . . 181 



, on their culture 209 



Bulbs, why capable of producing flowers without the aid of soil . . . 115 



CAMELLIA, Warratah, experiment made with cuttings of it . . . .342 



Canker in trees 81 



Capillary attraction 25,90,101,139 



Carbon in bulbs . 116 



absorbed by green fruits ...... ... 224 



Caudex 189, 342 



Celery, upon its culture .......... 294 



Cellular substance generated by the internal surface of bark . . . . 138 



, formation of vessels in it, and their direction . . .140 



- subsequently becomes vascular 143 



, descending vessels more readily formed in it than ascending 138 



in the alburnum and bark of oak . . . . .139 



permeable to the sap 1 40 



Centrifugal force . 167 



Cherry, Flemish . . . 277 



, Kentish . ... 277 



, Morello 277 



tres-fertile . . ... . . . . . . 277 



, Chinese, upon its culture 295 



Climate . . . 38 



induces changes in the habits of plants 173 



of England, upon its supposed changes 307 



Climbing plants, explanation of their growing towards support . . . 166 



Coloured infusions employed in tracing the course of the sap . . 86, 89 



