83-85.] 



THE LEAF-BUD. 



99 



with a solitary tuft of leaves, is the result, as in the 

 Palmetto of our southern borders. 



249. A partial suppression of buds occurs in almost all species, and gen- 

 erally in some definite order. In plants with, opposite leaves, sometimes one 

 bud of the pair at each node is developed and the other is suppressed, as in 

 the Pink tribe. When both buds are developed, the branches, appearing in 

 pairs like arms, are said to be brachiate, as in the Labiates, In many trees 

 the terminal buds are arrested by inflo- 

 rescence each season, and the growth 



is continued by axillary buds alone, as 

 in the Catalpa and Horse-chestnut. 

 In all trees, indeed, buds are sup- 

 pressed more or less, from various 

 causes, disguising at length, the in- 

 tended symmetry of the branches, to 

 the utter confusion of twigs and spray. 



250. Accessory Ituds, one 

 or more, are sometimes 

 found just above the true 

 axillary bud, or clustered 

 with it, and only distin- 

 guished from it by their 

 smaller size ; as in the 

 Cherry and Honeysuckle. 



251. Adventitious or ac- 

 cidental buds are such as 

 are neither terminal nor 



275 



276 



275, Hypericnm Savothra, with brachiate 

 branches. 276, Pink (Dianthus) axillary buds 



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 generally result from some abnormal con- 

 dition 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. The leaf of 

 the Walking-fern emits rootlets and buds at its apex ; 

 the leaf of Bryophyllum from its margin, each bud 



