VENEER, GRAFTING OF HERBACEOUS PLANTS 323 



The extensive technique of various kinds of grafting may be 

 found in practical books on horticulture. 1 



420. Veneer Grafting of Herbaceous Plants. Secure healthy 

 specimens of Lycopersicum about 2 5 cm. in height, or larger, So- 

 larium tuberosum of the same size and a number of geraniums. 



Make the following grafts : cut a tangental slice from the 

 surface of a part of the stem of the tomato firm enough not to 

 • be easily crushed, in such manner that the ring of woody tissue 

 is cut into. Now select a geranium stem of the same size and 

 cut off a section of the stem a few cm. long from which the 

 leaves have been removed with 

 the possible exception of one or 

 part of one. Make a tangental 

 slice on one side of this cutting 

 deep enough so that the wood of 

 the scion and stock, as well as 

 the cambium of both, will be in 

 contact when the scion is applied 

 to the stock. Tie the scion in 

 position with the tissues firmly 

 pressed together by means of 

 soft cords, or raffia fiber. It may 

 also be of advantage to bandage 

 with wet moss or cover the union 

 with a layer of soft wax made of 

 beeswax, resin and lard to prevent 

 desiccation. Cut away the stock above graft and set the prepara- 

 tion in a cool house for about ten days, then bring into a temper- 

 ate house. Care must be taken not to disturb the scion during 

 the process of union, and to remove all leaves and branches of 

 he stock below the graft. 



Repeat the process, putting scions of tomato on potato and 

 scions of potato on tomato. The greenhouse stock will offer many 

 other examples of suitable material for such experimentation. 



1 Bailey, L. H. The Nursery Book. 1896. 



Fig. 157. Transverse section of union 

 of a scion of potato, P, to a stock of 

 tomato, T. 1,1, line of contact of the 

 tissues of the two plants, cm, cambium. 

 After Wright. 



