STEMS 



25 



Buds may be classified 

 as to their arrangement on 

 the stem into : {a) alternate, 

 (b) opposite and (c) whorled. 

 It is well to keep in mind 

 that bud arrangement is 

 the same as leaf arrange- 

 ment, for the reason that 

 buds normally develop in 

 each leaf axil. Further- 

 more, as leaf buds develop 

 into shoots, the method of 

 branching, and hence the 

 form of the plant, is largely 

 determined by the bud 

 arrangement. 



When one bud occurs at 

 each node, they are said 

 to be alternate (Fig. 10). 

 When two buds stand at 

 a node, they are opposite 

 (Fig. 103). When more 

 than two buds stand at a 

 node they are said to be 

 whorled. 



Bud Variation.- — This is 

 a more or less common oc- 

 currence in trees of all 

 varieties. The buds on an 

 apple, peach, or citrus tree, 

 for example, differ from 

 each other in important 

 respects. That this differ- 



terminal leaf -bud 



flower-buds 

 \sfipule-scar 



llenticels 



latent hud-- 



one year' 

 old branch 



■ lateral leaf buds 



■ terminal bud- scar 



flower-bud-scars 



:o. — Cottonwood twig two years 

 old. {After Longyear.) 



