BUDS AND BRANCHES 



95 



acc..j 

 ax- 



8C 



ace 

 ax 

 --sc 



buds which are only slightly protected by scales, but these 

 buds are usually small and often more or less hidden under 

 the bark, as in the sy- 

 ringa (Philadelphus) 

 and the thorny honey 

 locust (Grleditsid). 



89. Buds become 

 shoots. If we watch 

 the opening and sub- 

 sequent growth of a 

 bud (figs. 76, 83, and 

 84), we shall find that 

 sometimes it develops 

 into a leafy shoot ; 

 that is, it forms the 

 beginning of a new 

 twig or lengthens out 

 the twig, branch, or 

 main stem at the tip 

 of which it was formed. 

 Sometimes it develops 

 into a flower or a clus- 

 ter of flowers. Some- 

 times it produces both 

 leaves and flowers. 

 Buds, then, are classi- 

 fied, according to the 

 results of their devel- 

 opment, into leaf buds, 

 flower buds, and mixed 

 buds. And since a flower (as we shall see 

 in Chapter IX) is only a peculiar kind of 

 shoot specialized for seed production, we 

 may define a bud as an undeveloped shoot 



90. Position of buds. Buds are either terminal (growing 

 from the tip of the stem) or lateral (growing from its side). 



FIG. 77. Twig of hick- 

 ory in winter condition 



sc, scar of last year's 

 leaf ; lut, a lateral bnd : 

 I, a last year's leafstalk ; 

 ax, a lateral bud in the 

 axil of the leafstalk; /. 

 terminal bud. Reduced 



B 



FIG. 78. Twigs of 

 butternut, with ac- 

 cessory buds, in win- 

 ter condition 



A , part of a twig, near 

 a leaf scar, about nat- 

 ural size ; B, tip of 

 another twig, slightly 

 reduced ; ace, acces- 

 sory bud ; ax, axillary 

 bud ; sc, leaf scar ; t, 

 terminal bud. Note 

 the unequal size of the 

 buds in R, and the 

 difference in shape be- 

 tween the axillary and 

 terminal buds in B 

 (all leaf buds) and the 

 two egg-shaped flower 

 buds, ft, in A 



