FORMS OF STEMS 



109 



/fy. 345. Conns of Putty-root (Aplectrum): a, of last year ; 6, of the present year. 



Fig. 346. Scale bulb of White Lily. 



Fig. 347. Scale bulb of Violet Sorrel (OxaUs vwlacca). 



with scales instead of leaves. Thus we have two classes of 

 Btems ; namely, leaf-stem* and scale-stems. These figures, 

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



Fig. 348. Rhizome of Solomon's Seal . a, fragment of the first year's growth ; b, 

 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. 349. Premorse rhizome of Trillium. 



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

 nee between them ? To which class dues Diclytra belong? Prince's Pine? 



