154 APPENDAGES. 



vicissitudes of a northern climate, and protect it from 

 other injuries till the period of expansion arrives. In 

 the northern section of the United States, we find but 

 few trees or shrubs capable of enduring the cold of 

 winter without this security. 



In Sweden we are told there is but one shrub desti- 

 tute of bud?, and that from the peculiarity of its situa- 

 tion, is always protected from the inclemencies of the 

 Swedish winter. But in warmer climates, the tender 

 shoots do not require this protection, and accordingly, 

 we find that the Orange, Lemon and Mimosa, and other 

 shrubs, natives of tropical regions, are not furnished 

 with the " winter cradles" of northern plants. If they 

 are, whatever may have been their natural situations, 

 whatever may be the degree of heat to which they have 

 been accustomed, they will probably endure the cold of 

 our winters and flourish without protection in the open 

 air. 



Botanists distinguish three varieties of buds, one to 

 enclose the leaves and their branches, one to contain 

 the rudiments of the future flower, while the other 

 possesses an intermediate or rather combined character, 

 am performs the office of both. The flower and leaf 

 buds are easily distinguished by their forms, the 

 former being round and short, the latter slender, long 

 and pointed. The Peach presents examples of each 

 variety, the leaves and flowers being distinct ; and the 

 buds of the Lilac enclose them both together. The 

 leaf bud will grow luxuriantly when placed on the 

 earth, but in the same situation the other uniformly 

 dies. 



It has been recently discovered, and it is a discovery 

 of no small practical importance, that these varieties of 

 buds are convertible into each other. Mariotte de 



