DEVELOPMENT OF BUDS. 99 
top, arising higher and higher, as it unfolds its axis into the 
joints (called nodes and internodes) of the stem, its outer 
scales into leaves, and is itself continually renewed from 
within. Thus the ascending stem, or avis, is always termi- 
nated by a bud. 
Fig. 829. Bud of Currant unfolding,—the scales (s) gradually becoming leaves. 
Fig. 330. Bud of Tulip-tree,—the scales unfolding into stipules (s). 
203. Soon other buds appear. There is one in the axil of 
each leaf. So long as the terminal bud only is developed, 
the plant grows up a simple stem. But by the growth of 
these axillary buds, if they grow at all, branches are pro- 
duced ; and these branches, from ¢hecr axillary buds, produce 
branchlets, and soon. 
202. What do you understand by the nodes and internodes? How is the 
axis always terminated ? 
203. In what case will the stem be simple? How are branches produced 
