164 



vestigators that this character is shown in the make up of 

 the cell-tissues. Macfarlane in an interesting address before 

 the American Association of the Advancement of Science 

 m Washington has shown that some hybirds are exactly in- 

 termediate in histological character between parents, and 

 that normally there is an equal blending of both parents. 

 We have had under observation in interesting hybird be- 

 tween DeSoto plum {Prunus Americana) and an Oregon 

 plum (Prunus domestioaf) In habit of tree and foliage 

 the hybirds assume the character of Prunus americana 

 our wild pinra. This variety is strongly prepotent in trans- 

 mitting tendency to take a disease {C^adoeporium carpop- 

 hyluTn) which does not occur on our cultivated European 

 plum (^Prunus domestica)- But this is by no means the 

 invariable rule. Darwin says. "It would appear that in 

 certain families some ancestor, and after him others in the 

 same family have had great power in transmitting their like- 

 ness through the male line." Henry L. LeVilmora says: 



"In framing the character of the progeny the action of 

 each parent is often very unequal, according to the power of 

 each in transmitting its characters. The one that is better 

 endowed in that respect stamps its features more firmly on 

 the cross-bred plant. Discussions have arisen on the influ- 

 ence of the male and of the female progenitor on a cross. 

 I believe that the strongest organism of the two, the one 

 rather which is best endowed with the power to transmit its 

 characters will predominate in the progeny, whether it 

 comes from the male or female parent. " 



Graft There has been considerable discnssion on the qnes- 

 Hybrids. tjQjj Qf gp^fj. hybrids. Gardeners and horticul- 

 turists have maintained that hybrids have often been pro- 

 duced by budding and grafting. One of these has become 



