62 ELEMENTS OP STEUCTUEAL BOTAKV. 



swollen end of the stem. This swollen mass is coated on 

 the outside -with thin 'scales. A section across the middle 

 shows it to he more or less solid, with the stem growing^ 



rig. 82. 



up through it from its hase. It is, in fact, not easy to say 

 how much of this stem-like growth is in reality stem, 



Fig. 82.— Dog's-tooth Violet. 



