36 



STEMS AND BUDS 



can be readily recognized by the fact that, like all stems, they are 

 divided into more or less regular nodes and internodes, and the 

 branching is alwaysi from these nodes and is, therefore, regular, 

 while the roots are without nodes and branch irregularly. 



Fia. 27. Underground stem of the Solomon's seal. 



FIG. 28. a, tulip bulb; b, same cut longitudinally to show short basal stem and fleshy 

 leaf overlapping the single terminal bud. 



Numerous roots are frequently formed at the nodes of these 

 underground stems. 



Underground stems may be divided into two general types, 

 the elongated and the short. The elongated stems, which are so 

 well illustrated by the Solomon's seal and May-apple (Fig. 27), 



