DEVELOPMENT OP BUDS. 



99 



top, arising higher and higher, as it unfolds its axis into the 

 joints (called nodes and interiiodes) of the stem, its outer 

 scales into leaves, and is itself continually renewed from 

 within. Thus the ascending stem, or axis, is always termi- 

 nated by a bud. 



Fig. 329. Bud of Currant unfolding, — the scales («) gradually becoming leaves. 

 Fig. 8S0. 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 their axillary buds, produce 

 branehlets, and so on. 



303. What do you understand hy the nodes and internodes ? How is the 

 axis always tenuinated 1 

 303. In what case will the stem he simple ? How are tranches produced ? 



