FORMS OF STEMS. 



100 



Flg.Uh. Conns of Putty-root (.4/9Zfci/7m): «, of last year ; 6, of the present year. 



Fig. 346. Scale bulb of White Lily. 



Fig. 347. Scale bulb of Violet Sorrel {Oxalis vlolacca). 



with scales instead of leaves. Tims we liave two classes of 

 stems ; namelj, leaf -stems and scale-stems. These figures, 

 one of the delicate Diclytra and the other (Fig. 341) of the 



Fig. 348. Ehizome of Solomon's Seal: a, fragment of the first year's growth ; J, 

 the pocond year's growth; c, the third year's growth, bearing d, the stem oftho 

 present year, which will leave a scar (the seal), like that of the others. 



Fig. 349. Premorse rhizome of Trillium. 



228. What two classes of stems liave we to consider? "SVliat is the diflfer- 

 ence between them ? To which class does Dicly tra belong ? Prince's Pine ? 



