HYBRIDISING AND CROSS-BREEDING. 



127 



and thus habits are formed which in time become permanent, 

 and which are reproduced from seed. 



In illustration of the foregoing remarks, and to show more 

 plainly how races have already been fixed by intelligent 

 hybridists, the following tables of parentage or pedigrees are 

 given : 



R. Catawbiense 



X 

 R. arboreum 



R. Ponticum 



X 

 R. maximum 



C. viticella 

 X 

 C. integrifolia 



B. Vdtchii 

 x 

 B. Boliviensis 



B. species 

 X 

 B. Boliviensis 



BEGONIA. 



Intermedia 

 X 

 ISedeni 



Acme, and others. 



Mixed Pollen. The idea of mixing the pollen of several 

 plants that is, either closely-related species or varieties to- 

 gether, in order, if possible, to obtain greater variability or mixed 

 qualities in the offspring produced, has suggested itself to 

 many hybridisers, but in practice (that is, in the origination of 

 new flowers or fruits) it has little if anything to recommend it ; 

 while, from a scientific point of view, the results of such fer- 

 tilisation are too uncertain to be of any value, since even when 

 only one kind of pollen is employed great precautions must 

 be taken and everything noted with great exactness in order to 

 render the results obtained of any scientific interest. In the 

 ' Journal of the Royal Horticultural Society ' for 1850, vol. v. 



