NOTES ON RECENT RESEARCH. 



523 



being decidedly altered, as of the variety Zephirin Gregoire. If the pear 

 be grafted on Pyrus Aucuparia L., the fruits always acquire a harshness 

 characteristic of the latter. Thus, the very sweet variety Duroncleau* 

 {Poire de Tongrc) acquired an acrid flavour when grafted on this Pijnts. 



A second influence is the hastening the maturity of fruits naturally 

 slower to ripen when grafted upon more precocious stocks. The author 

 names several varieties in illustration. 



In the case of a vine, Chasselas de Fontainehleau, grafted with Vroege 

 Van der Laan, which is subject to dropping its fruits, the grafted vine 

 never lost any, but it affected the stock, which then regularly dropped its 

 fruit. 



The size of the fruit has been altered when an Apple bearing small 

 fruit has been grafted on a scion which bore large ones. The volume was 

 increased on the scion ; the converse was equally true. These results were 

 repeated for four years in succession. 



The Peach grafted upon an Almond stock perished with a temp3rature 

 of —12° to —15^ C, but on the Plum {Prunus domesticaLi.) it could with- 

 stand —18° to 120= C. 



The kernels of Peaches from trees with purple-coloured leaves give 

 95 per cent, of the same, but if taken from the trees grafted upon the 

 Peach or Plum only about 30 to 40 per cent, will have coloured leaves. 

 Similar results follow from the Beech, Hazel, Birch and Plum. 



If a red-flowered Camellia or Azalea indica be grafted with a white- 

 flowered variety, many bear striped flowers. 



The weeping Gleditschia Bugoli, Hort., will not stand frost in Belgium, 

 but when grafted upon the hardier G. triacanthos L. it can do so in 

 ordinary winters. 



Thuya Vervceneana, with yellow leaves (derived from T. occidentalis), 

 has a pyramidal form, but if grafted on Biota aurea, of a more rounded 

 shape, it assumes the same character. 



Many variegated shrubs revert to an entire green in their leaves, but 

 •the author noticed some variegated Hollies, grafted upon rooted cuttings of 

 variegated Hollies, which failed to turn green (as others not so grafted did 

 in the same garden) for ten years. 



Cotoneaster hibxifolia and C. Simonsi have evergreen leaves, but when 

 grafted upon Cratcegus Oxyacantha they became deciduous. 



Certain varieties of Apple are very subject to canker, others not so ; 

 but if the latter be grafted on the former the disease appears upon 

 them. 



On the other hand, if varieties of ' Raisin,' which are delicate and liable 

 to disease, be grafted on the vigorous and sound ' Frankenthal,' they 

 become completely "regenerated." 



If the laciniated variety of Walnut be grafted upon the common form, 

 the leaves of the scion become less laciniated, or it may even bear leaves 

 with entire leaflets. Similar results have occurred with many other trees, 

 as Nut Hornbeam, Oak, Birch, and Alder. — G. H. 



* Durondcan, or De Tongrc. is an unfortunate example to have chosen, as in 

 England at least no one could call it a " very sweet " pear, and the very thin layer 

 immediately underneath the skin is often, if not generally, inclined to be a little 

 acrid. — Ed. 



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