54 Mr. Roscor on Artificial and Natural 
to which the arrangement of Tournefort is wholly incompetent, 
his authority has declined; but Linneus has not always gained 
the followers that Tournefort has lost. Other leaders have risen 
up, and proposed arrangements and nomenclatures of plants 
wholly different from those of Linneus; and in particular, the 
successive efforts of the distinguished family of Jussieu have 
raised a standard to which many of the most eminent botanists 
of the present day think it an honour to resort. 
The system of the Jussieus, as originally proposed by Bernard, 
and afterwards illustrated and amplified by Antoine Laurent de 
Jussieu, has higher pretensions than that of Linnzus, and pro- 
fesses not only to unite together in their natural orders such 
plants as are related to each other, but to form a complete 
arrangement, in which every known plant may be found in its 
proper situation, and every unknown plant may when discovered 
take its place among its congeners. A system, in short, which 
unites all the advantages of a natural arrangement with the elu- 
eidation of a technical one ; and comprises within itself all that 
is requisite to botanical science*. If such a system could be 
established, it is evident that it must render that of Linnzeus of 
. no value; or, rather, must exhibit it as calculated only to mislead 
the student, and amuse him with words, instead of communicat- 
ing to him substantial knowledge. . 
In the execution of his task the younger J ussieu had peculiar 
advantages. Since the time of Linnzus the accessions to. the 
science have been immense ; not only from the introduction of 
new genera and species, which to him were wholly unknown, 
but from the greater attention which has been paid to the exa- 
æ “ His genuina mox substituitur scientia, que vegetantium non modo nomina, ‘sed et 
neluram inquirens integram eorum organisationem cunctos caracteres prospiciat, &c.’” 
Jussieu, Introduc. p. 67. 
mination 
