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A TEXTBOOK OF BOTANY 



[Cn. IV, 10 



whence their botanical name of ROOTSTOCKS; but they are 

 always distinguished by the presence of nodes and rudi- 



FIG. 130. Stolon of Black Raspberry. (From Bailey.) 



mentary scale-like feaves. Such rootstocks often accumu- 

 late food, thus tending towards new organs, which we may 

 best consider in the following section. 



There also occur a kind of traveling stems. The very 

 slender woody stems of the Brambles bend over and touch 



FIG. 131. Sempervivum sobolijerum, showing typical offsets. 

 (From Kerner.) 



the ground at their tips, where they take root ; and thus the 

 plants form dense and ever advancing thickets (Fig. 130). 



