Arrangements of Plants. 69 
plants into apetalous, monopetalous, and polypetalous. Of these the 
apetalous are to be again subdivided by the stamina, which are 
considered with respect, not to the number, but the situation ; 
and as in the absence of the corolla the stamina are inserted di- 
rectly into the style or germen, this is denominated the absolutely 
immediate insertion of the stamina, constituting the fifth, sixth; 
and seventh, of his classes. The monopetale, distinguished into 
separate tribes by the corolla, which is for the most part stamini- 
ferous, and is therefore said to exhibit the mediate insertion of 
the stamina, form the eighth, ninth, tenth, and eleventh classes ; 
and the polypetale, characterized again by the situation of the 
stamina, the insertion of which is here called simply immediate, 
as it accidentally varies at times into the mediate insertion, or in 
other words is found sometimes on the germen and at others on 
the corolla*, form the twelfth, thirteenth and fourteenth of his 
classes; his fifteenth and last being composed of gr ne 
regular plants, not properly reducible to any other head. 
Independent, therefore, of the distinctions arising ron the 
cotyledons, which, however well founded, have been shown to be 
of little practical utility, the system of Jussieu is the system of 
'l'ournefort; in which Jussieu has, it seems, discovered advantages 
resulting from the incidental connection between the stamina and 
the corolla, of which Tournefort himself was not aware}. It 
vt * | must 
_ * © Insertio immediata vel est absoluta in mediatam mutari nescia, dum corolla suppri- 
mitur, ut in apetalis; vel est simplex, in mediatam foríuitó mutabilis, dum corolla ex- 
istens non gerit stamina, et tamen ferre interdum potest, ut in plerisque polypetalis," &c. 
Juss. Gen. Pl. p. 79. 
t “ Tria inde eruuntur signa primaria, fere essentialia ac ceteris spectabiliora, jam in 
Tournefortianà methodo feliciter adhibita, singula ter dividenda a situ staminum in ee: 
talis et polypetalis, corolle in monopetalis." Juss. Gen. Pl. p. 80. 
** On retrouve donc ici une des grandes divisions de Tournefort prise de la eiiis or- 
gane trés secondaire en lui-méme, mais qui, par son union avec um organe principal et 
/ essentiel 
