6 Mr. Roscor on Artificial and Natural 
It is not. sufficient that we admit, in its fullest extent, the expe- 
diency and utility of studying the natural arrangements of plants, 
but we are now required to adopt this new system as a general 
arrangement and nomenclature, in the stead of that of Linnzeus ; 
to discard his labours, as of an inferior and a succedaneous kind ; 
. and to hail the moment when the great event, which he is said to 
have himself considered as the destruction of his own system, 
has actually taken place. Ä 
It is true the triumph of the new system bas not yet been 
announced, even by its warmest promoters, in distinct and 
unambiguous terms; but the very arrangement of a Genera 
Plantarum, like that of Jussieu, offers it to universal use; and 
the manner in which it is spoken of, both by him and. his fol- 
lowers, sufficiently demonstrates that this is its ultimate object, 
to the total exclusion of that of Linnzus. In the very introduc- 
tion to his work, Jussieu has himself sufficiently disclosed bis 
views, by the objections which he has brought against the 
system of his illustrious predecessor ; the tendency of which is 
not merely to show that it is imperfect when considered as a 
natural arrangement, but that even as an artificial one it is not 
entitled to a preference. In arranging these objections Jussieu 
has observed, “ 1. That the distinctions of the Linnean system 
are sometimes founded on the minuter organs of vegetables, 
requiring the use of glasses and instruments. 2. That the 
method is arbitrary ; the distinctions of his classes being derived 
from some one part only; and that from a deficiency of real 
characters he is compelled to adopt such as are inconstant, 
which he uses frequently and promiscuonsly, to the exclusion of 
those which are substantial. 3. Thatin determining by the num- 
ber of stamina, not only genera nearly related to each other are 
frequently 
