CHAT. II. GLANDS. 67 



ternal surface, as those of the Cherry ; some are 

 hairy, as those of the Viburnum ; some are resinous, 

 as those of the Horse-chesnut ; and some are marked 

 with angles, as those of the Walnut. 



But all plants are not furnished with buds. An- Notuni- 

 nuals have none. And even trees and shrubs, to 

 which they are proper, do not produce buds in hot 

 climates ; because, perhaps, in hot climates the 

 tender germe requires no covering to protect it. But 

 in this country, and in all cold countries, trees and 

 shrubs are universally furnished with buds ; and 

 without the intervention of a bud, no new part is 

 added to the plant. In all cold countries therefore, 

 buds are indispensable to the progress of vegetation ; 

 and yet they do not seem to be of any particular use 

 to the botanist in the discrimination of the species, 

 as being apparently altogether dependant upon 

 climate. From their peculiarity of external form, 

 however, in different species of plants they may 

 serve occasionally to distinguish plants in the win- 

 ter ; and gardeners do in fact distinguish almost 

 all their plants by the bud. 



SECTION II. 



Glands. 



GLANDS are small and minute substances of vari- Descrip- 

 ous different forms found chiefly on the surface of *' 



F2 



