338 GLOSSARY. 



Bulb. A large and more or less permanent and fleshy leaf- 

 bud, usually occupying the base of the stem and bearing 

 roots on its lower portion. Scaly bulbs, like that of the 

 lily (Figs. 19, 20), are made up of narrow and mostly 

 loose imbricated scales. Tunicated or laminated bulbs, 

 like that of the onion, are composed of closely fitting 

 and more continuous layers or plates. 



Bulbel. A smaller or secondary bulb borne about a mother 

 bulb ; bulbule. Page 27. 



Bulblet. A small bulb borne wholly above ground, usually 

 in the inflorescence or in the axil of the leaf, as in " top 

 onions," tiger lily, etc. 



Bulbo-tuber. See Corm. 



Bulbule. See Bulbel. 



Callus. The mass of reparative or healing tissue which 

 forms over a wound. 



Cambium. The tissue which lies between the bark and the 

 wood, and from which those parts arise. 



Chinese-layering. See Pot-layering. 



Chip-budding. That style of budding which removes a 

 truncheon or chip of bark and wood from the side of the 

 stock, and fills the cavity with a similarly shaped bud 

 from the variety which it is desired to propagate. Fig. 

 100. 



Cion or Scion. A portion of a plant which is mechanically 

 inserted upon the same or another plant (stock), with the 

 intention that it shall grow. See Chapter V., and Figs, 

 loi, I02, 108, III, 115, 116, 119, and others. 



Cion-budding. See Shield-grafting. 



Circumposition. See Pot-layering. 



Cleft-grafting. That method of grafting in which the stock 



is cut off completely and then split, and one or more 



cions, cut wedge-shape, inserted in the cleft. Figs. 118, 



119, 124, 125, 126, 134. 



The grafted end of the stock (Figs. 118, 126) is called 



