FORMS OF STEMS 



100 



Fig. 2,^0. Conns of Putty-root (^;?fcc^/-Mm): a, of last year ; 6, of the present year. 



Fig. 346. Scale bulb of White Lily. 



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



with scales instead of leaves. Thus we have 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 ; 5, 

 the second year's growth; c, the third year's growth, bearing d, the stem of the 

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



Fig. 340. Prernorse rhizome of Trillium. 



228. What two classes of stems have we to consider ? What is the differ- 

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



