Tà Mr. Roscot on Artificial and Natural 
that the two systems of Linnzus and Jussieu are in this respect 
nearly a transposition of each other; and that: whilst Linnzeus 
begins his great divisions with the essential organs of fructifica- 
tion, and. proceeds to characterize his inferior divisions by parts 
of less natural importance, Jussieu has formed his leading di- 
stinctions upon the corolla, and the situation of the stamina; 
and has employed the number of the stamina and style to divide 
his orders into sections. Which of these methods is to be pre- 
ferred the reader will decide; but as they are in fact equally 
natural, or equally artificial, that which most clearly defines the 
plant in question, which supplies a concise and intelligible no- 
menclature, and most effectually assists the student in his re- 
searches, is undoubtedly | to be preferred : and in these respects 
it will scarcely be contended that the system of Jussieu is supe- 
rior to that of Linnæus. 
In forming their genera both Lione and ise have ex- 
erted all thei talents. They were both of them equally con- 
vinced that these combinations were founded in nature, and: 
ought equally to be adhered to under every mode of arrangement. 
Here then there can be no comparison, except as to the superior 
skill exhibited i in the composition and description of such genera. 
Which of them has excelled in this respect I shall not take upon: 
myself to decide; but if the preference is to be given to Jussieu 
in any instance, it is perhaps in the full and scientific manner in. 
which his genera are defined. | 
But whatever may be the merits of these rival doe in other 
respects, there is one objection still remaining against that of 
Jussieu, which strikingly reminds us of tbe prediction of Linnzus, 
and renders it as a nomenclature entirely useless. Unable to 
comprehend in any of his divisions all known genera, he is com- 
pelled to annex to the close of several of his orders many plants, 
which 
