INTRODUCTION. 7 



In these by far more numerous on Earth, we 

 find whole families altogether frutescent as the 

 Palms are among Monocotyles. Such are the 

 true Rosaceous, Prunides, Pomides, Mag- 

 nolides, Annonides, Coniferes, Amentaceous, 

 Cupuliferes, Laurines, Meliaceous, Ericoides, 

 Vaccinides, Jasminides, Sarmentose, and many 

 others: while there are but few families that are 

 totally destitute of the arborescent or frutescent 

 forms. 



Among the obsolete and incongruous Genera 

 that Jussieu and others could not reduce to his 

 natural families, because unwilling to see that 

 they were types of new ones, nearly all were 

 frutescent and have since been properly distri- 

 buted or framed into peculiar families, even 

 when 1 or 2 Genera only may have been the 

 original types. I shall do the same with some 

 others, that have been neglected, because the 

 Botanists were puzzled where to place them. 



Lastly the object of this Mantissa is both to 

 correct generic errors and omissions, and to add 

 at least all the Trees and Shrubs already known 

 and described or figured, to our actual mass of 

 botanical improved knowledge, upon the plan 

 proposed and pursued in my FLORA TELLUHIANA, 

 for many other branches of Botany. 



Philadelphia, October, 1838. 



