FORMS OF STEMS. 109 
Huy 
Fig. 345. Corms of Putty-root (Aplectrum) : a, of last year; 6, of the present year. 
Fig. 846. Scale bulb of White Lily. 
Fig. 847. Scale bulb of Violet Sorrel (Ozalis violacea). 
with scales instead of leaves. Thus we have two classes of 
stems; namely, leaf-stems and scale-stems. These figures, 
one of the delicate Diclytra and the other (Fig. 341) of the 
Fig. 848. Rhizome of Solomon’s Seal: a, fragment of the first year’s growth; 3, 
the second year’s growth; v, the third year’s growth,. bearing ¢, 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 the differ- 
ence between them? To which class does Diclytra belong? Prince’s Pine? 
