42 



MORPHOLOGY OF BUDS. 



leaf-buds. In other hardy shrubs and trees, the buds, equally 



or almost destitute of scales, 

 are minute, hidden in or un- 

 der the bark, or otherwise 

 inconspicuous until vernal 

 growth commences. Phila- 

 delphus and Taxodium are of 

 this kind. 



72. Subpetiolar Buds. Some 

 leaf-buds are singularly cov- 

 ered in their early state and 

 through the summer, as in the 

 Locust (Robinia) , Honey-Lo- 

 cust Fig. 96 (where they re- 

 main very undeveloped), in 

 Yellow Wood (Cladrastis), and 

 more conspicuously in the 

 Plane-tree (Platanus, Fig. 87) : 

 here they are all formed un- 

 der the base of the protecting 

 leaf-stalk, which in Plane-tree 

 ^5f V-J forms a sheath or inverted cup, 



very like a candle-extinguisher, 



fitted to and concealing the conical bud until autumn, when by 



the fall of the leaves these buds are exposed. 



FIG. 83. Diagram of vertical section of a strong bud, such as of Horsechestmit. 

 84. The axis of the same developing, the elongation beginning with the lowest inter- 

 node, soon followed by the others in succession. 85. A year's growth of Horsechestmit, 

 crowned with a terminal bud: a, scars left by the bud-scales of the previous year: 

 b, scars left by the fallen leaf-stalks: c, axillary buds. 



FIG. 86. Branch and buds (all axillary) of the Lilac. 



FIG. 87. Leaf-bud under the petiole of the Plane-tree. 



