NOTICE. 



This Synoptical Mantissa being a Supple- 

 ment to all the works on Dendrology and Xylo- 

 gy, as well as to my own : those New G. and Sp. 

 of Trees and Shrubs already described by my- 

 self in my various works and Floras, above all 

 my two late Flora Telluriana and Flora of 

 North America, as well as my Medical 

 Flora of the United States, will seldom be no- 

 ticed or repeated here. 



The whole of the New Genera of such Trees; 

 will be duly reduced to their natural orders, and 

 a Table formed of them: so as to present at 

 once a view of the generic additions to these 

 natural groups, and a proper classification of 

 such additional Discoveries or Revisions. 



But few Genera of which only the flowers 

 are known and not the fruit, or viceversa, will 

 be introduced ; but some may, as did Gaertner 

 and others when they only obtained imperfect 

 materials or figures. 



