226 The Horticulturist* s Rule-Book. 



Regermination. Second germination. Seeds which have 

 been checked after germination has begun may resume the 

 process under favorable conditions. 



Root. A part of the plant which bears neither leaves nor 

 buds, and which absorbs nourishment for the plant, or serves 

 as a support for it. It may be subterranean or aerial. 



Root-cap The covering upon the end of a growing root. 

 The elongation of the root takes place just behind the 

 root-cap. 



Root-grafting. Grafting upon the root. 



Root-hair. A very delicate prolongation of a cell of a 

 young root. Root hairs are active agents in absorbing plant 

 food. 



Rot. The decay of the thicker part of plants, however 

 brought about ; the amount of moisture present determin- 

 ing whether it shall be called wet or dry rot, as potato-rot. 



Runner. A procumbent or creeping herbaceous shoot 

 which takes root at the joints. 



Rust. Any plant disease in which the surface of the 

 plant is apparently converted into a powder or scurf, par- 

 ticularly when of a ferruginous or blackish color, as wheat 

 rust. 



Saddle-graft. A sort of grafting in which the scion is split 

 below and inserted over the end of the stock, which is cut 

 wedge-shape. 



Salad. A dish of uncooked herbs, or chopped meat com- 

 bined with uncooked herbs. 



Sap. A term designating loosely the liquid contents of 

 plants 



Saprophyte. A plant which lives upon dead or decaying 

 matter, as a mushroom or toadstool. 



Scion, or Cion. A portion of a plant which is mechani- 

 cally inserted upon the same or another plant with the in- 

 tention that it shall grow ; a graft As commonly used, a 

 scion, in distinction from a bud, bears two or more buds. 



