STRUCTURAL BOTANY. 



and the growth is continued by axillary buds alone, as in theCatalpa and Horse-chestnut, 

 In all trees, indeed, buds arc suppressed more or less, from various causes, disguising ai 

 length the intended symmetry of the branches, to the utter confusion of twigs and spray. 



VJ3, Bud of Currant unfolding, the scales gradually becoming leaves. 274, Bud of Tulip-tree, -the 

 scales unfolding into stipules. 



250. Accessory buds, one or 

 more, are sometimes found just 

 above the true axillary bud, or 

 clustered with it, and only dis- 

 tinguished from it by their 

 smaller size ; as in the Cherry 

 and Honeysuckle. 



251. Adventitious or acci- 

 dental buds are such as are 

 neither terminal nor axillary. 

 They occasionally appear on 

 any part of the plant in the 

 internodes of the stem or 

 branches, on the root or even 

 the leaves. Such buds gener- 

 ally result from some abnormal 

 condition of the plant, from 

 pruning or other destruction of 

 branches or stem above, while 

 the roots remain in full vigor ; 

 thus destroying the equilibrium 



of vital force between the upper and lower axis. 



275 



276 



275, Ilypericum Sarothra, with brachi.ite 

 branches. 276, Pink (Dianthus) axillary budi 

 alternately suppressed. 



The leaf of the 



