79G JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY'. 



resulted, after years of cultivation and hybridization, of abnormal 

 flowers, a number of perfect doubles appearing on a batch of variants. 

 It was raised by M. Vallerand, but no name is given. — C. T. D. 



Graft Hybrids. By W. Heuer (Gartenfiora, vol. lix. pt. xx. 



pp. 434-442; 3 figs.). — The hybrids of Solanum Lycopersicum and 



S. nigrum, S. Melongena, and S. Dulcamara are described and 

 illustrated.— E. W. 



Graft Hybrids. By W. Nienburg (Gartenfiora, vol. hx. pt. xxii. 

 pp. 479-485; 4 figs.). — Winkler obtained hybrids of Solanum Lyco- 

 fersicum and S. nigrum by inserting a wedge-shaped graft of S. nigrum 

 into »S'. Ly coper sicum stock. When union between stock and scion 

 is complete, the graft is cut back so as to leave only a small wedge of 

 the scion in the stock. After the wound has healed, young shoots 

 appear, but all are removed excepting those which spring from the 

 parts where the tissues of the stock and the scion are in juxtaposition. 

 In this way two hybrids were obtained, S. Koelreuterianum and 

 S. tubing ense. They can only be propagated from cuttings, not from 

 seed. Baur's research on the white-edged zonal pelargonium threw 

 light on the nature of these hybrids. S. tubing ense must be regarded as 

 aS'. yiigrum surrounded by a layer of S. Lycopersicum cells. In 

 S'. Koelreuterianum the case is reversed; cells of S. Lycopersicum are 

 surrounded by a layer of aS'. nigrum cells. — S. E. W. 



Grafting", Influence of Scion on Stock. By Louis Hemy 



{Jour. Sac. Nat. Hort. Fr. ser. iv. vol. xi. p. 58). — The vexed question of 

 intercrossing between scion and stock is here considered from the point 

 of view of the possibiHty of the scion affecting the stock. Apparently 

 authentic cases are cited where shoots have appeared upon the stock 

 below the graft bearing unmistakable traces of the influence of the 

 scion, and it is stated that certain well-known h3^brids, the ' Medlar of 

 Brouvaux ' Crataegomespilus Dardari Simon Louis, Citrus Bizarria 

 Eiss. and Poit., and Cytisus Adami Poit., were produced in this way 

 after accidental removal of an old-established scion. — M. L. H. 



Grafts, Seed Stock and. By A. Janson (Oester. Gart. Zeit. 

 vol. V. pts. 1 and 2, pp. 24-28, 63-69). — By careful selection of seed 

 from the best-grown plants an improvement in the race can be effected ; 

 in the same way, -great attention should be paid to the selection of 

 grafts. In the case of fruit trees, these should be chosen only from 

 healthy trees which have borne well-flavoured fruit.- The stock is 

 merely the means of supplying the upper part of the tree with the 

 nourishment which the roots draw from the soil. Dwarf stock, such 

 as Paradise, limits the supply, consequently the growth of the tree is 

 checked, and fruit-bearing takes place earlier than is the case when 

 the crab is used as stock. The stock should be grown from seed. 



S. E. W. 



