FORMS OF STEMS. 



109 



Fig. 845. Conns of Putty-root (.iipfeciri«m) : », of last year ; J, of the present year. 



Fig. 846. Scale bulb of White Lily. 



Fig.. Si7. Scale bulb of Violet Sorrel {OxaUs molacm). 



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

 stems ; namelj, leaf-stems and saale-stema. These figures, 

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



Ftg. 848. Ehizome of Solomon's Seal: a, fragment of the first year's growth ;»i, 

 the second year's growth; o, 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. 



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

 ence between them 1 To which class does Diclytra belong 1 Prince's Pine ? 



