THE STEM 41 
just below the surface and giving off leaves from the 
upper surface and roots from the lower surface. It can 
Fic. 24.—Sucker of Mint. 
f. Foliage leaf. s. Scale leaf, 
be distinguished from a root because it ends in a bud, 
not a root-cap, and scars show where previous seasons’ 
leaves have been borne. Itis amost successful method 
Fia, 25.—Rhizome of Iris, 
A. Bud. B.’ Scar of previous shoots, 
of growth, and plants which have developed this kind of 
stem are able to stand most adverse conditions of drought 
and cold very well. 
