110 STATE HORTICULTURAL SOCIETY. 



taken for granted that scions from nursery stock or other non-bearing 

 trees, or water-sprouts from bearing trees, will not come into bearing 

 quite so soon as scions of moderate vigor taken from bearing trees. M. 

 Carriere " declares that in budding roses he can produce plants that 

 flower profusely, sparingly, or not at all, by selecting buds from different 

 parts of the same plant. " (Popular Gardening Oct., 1890, p. 14). 



Increased fruitfulness as the result of grafting is in some cases due to 

 added vigor. Thus the quince, when grafted on the thorn, is said to be 

 longer lived and more fruitful than usual. This is probably the case in 

 certain soils only. The Vitis vinifera is said in Europe to be more fruit- 

 ful as well as earlier when grafted on the American Vitis riparia {Revue 

 Hortieole, 1882, p. 113). 



Burbidge states 1 that Snow's Muscat Hamburgh grape in most cases 

 bears irregular clusters, disfigured by a large proportion of small or under- 

 size berries when grown on its own roots, but that it sets more perfectly 

 on Black Hamburgh stock, a variety notable as being of robust constitution 

 and a good setter. This change may be partially due to better 

 fertilization. 



Darwin says : 2 " Thouin found that those species of Robina which seeded 

 freely on their own roots, and which could be grafted with no great diffi- 

 culty on another species, when thus grafted were rendered barren. On 

 the other hand, certain species of Sorbus, when grafted on other species, 

 yielded twice as much fruit as when on their own roots." 



W. A. Wooler states a that he grafted Paul's Scarlet thorn on the pear, 

 and that the fruit produced, instead of being single-seeded as usual, con- 

 tained from two to four seeds. A writer in Gardener 's Monthly says:* 

 " More than twenty years ago I procured grafts from an adjoining county 

 of a large and almost seedless variety [of persimmon] and grafted 

 them on a non-bearer. The result has been large, fine fruit, but very 

 seedy." 



Thomas Meehan, the editor, thought it probable in this case that more 

 perfect nutrition of the graft on the new stock caused it to produce better 

 developed pistils, and therefore more seed. 



Thomas Andrew Knight 5 states that an apple grafted on the pear bore 

 fruit, but that the core was black and the seeds wanting. No fruit was 

 produced on adjoining trees of the same variety of the apple, frost having 

 killed the blossoms. The frost, therefore, while it prevented the forma- 

 tion of the fruit on the original stock, seems only to have prevented the 

 formation of the seed when grafted on the pear. 



Other cases of increased vigor as the result of grafting may be men- 

 tioned. Thus, C. M. Hovey states 6 that Magnolia acuminata, when used 

 as a stock, imparts great vigor to such species as glauca, Soulangena, 

 Thompsoniana and Lennei. 



J. C. Loudon says 7 : "Acer eriocarpum, when grafted on the common 

 sycamore, attains in Europe double the height which it does when raised 

 from seed. * * * The common lilac attains a larger size 

 when grafted on the ash." Michaux states* that the striped maple (Acer 



1 Propagation of Plants, p. 60. 



- Origin of Species, p. 281. 



3 Gardeners' Chronicle, 1870, p. 45>>. 



* Vol. XVIII, 1876, p. 113. 



s Horticultural Papers, 1849, p. 222. 



6 Transactions Massachusetts Horticultural society, 1880, p. 115. 



' Horticulturist, 1849, p. 283. 



s J. G. Jack, ic Garden and Forest, 1890, p. 54. 



.' 



