THE JESSIEUS AND THE NATURAL METHOD. 



275 



simply immediate, will be divided, like the apetalous, according to tlie iiisertious 

 epigyiiic, hypogynic, and perigynic of the stamens, without any further subdivi- 

 sion. I'he class of did in es will close this series of eleven classes, which, joined 

 to the four preceding, will carry the whole number to fifteen, in which we can 

 arrange all the families known, without decomposing them." (Article Methode 

 naturellc of the Diet, dcs Sciences Naturelles. 



The following is the table of these fifteen classes given by Laurent himself in 

 the article just cited; 



ACOTYLEDONES AcotyUdoncs 



i etamens hvpocfvnous Moitohypo^y^ia. . 



MONOCOTYLEDONES I st ameus perigyuous Monnperi'gyna: . . 



( stamens epigynous Moncicpiaynii: 



ApETAL^. 



f 8ta 



. <8ta 



<sta 



DICOTYLEDONES 



MOXOPETALiS. 



POLYPETAL^. 



Stamens epigynous Epislamcneu' 



"amens perigyuous Firistaminciz 6 



imous hypogynous - Hypustam inca: 7 



corolla hypojryuous Hypororollca 8 



corolla perigyuous PcricorMca: 9 



f anthers united EpicoroUca: I -.q 



corolla epigynous < Synanthrm J 



C anthers dJBtinct Epicurollea . . } -,, 



C/tnri.-ianthfra ) 



tamens epigynous Epipcialca 1- 



tamens hyi)Ogynous Ilyjiopctalea 13 



tamcus perigyuous PeriprJalra 14 



I.DICLISES Diclines 15 



In the table placed at the head of the Genera Plantarum, instead of the names 



which here indicate each class, the author had merely employed the number, a 

 mode of designation which, as is seen above, he judiciously changed. 



INDEX METHODI 



< sta: 

 ( btai 



Ordines naturales cortiplectentis. 



ACOTYLEDONES Class 



( stamina hypogyna 



MONOCOTYLEDONES . \ " perigyna 



epigyna. 



r 



APETALJi. 



DICOTYLEDONES. 



MONOPETALi:. 



I POLYPETAL.?;. 



I Diclines ikregulares 



stamina epigyna 



" perigyna 



' ' hypogyna 



(■ corolla hypogyna 



) " perigyna 



I " „r.i<r „n C antheris counatirt. , 

 I epigyna ^ .^utijeris distinctis. 



tamiua epigyna 



" hypogyna 



perigyna 



I 

 II 

 III 

 IV 



v 



VT 



VII 



VIII 



IX 



X 



XI 



XII 



XIII 



XIV 



XV 



M. de Jussieu has been censured, and with reason, for the arrangement of his 

 classes, founded on the forms of the corolla. It will be seen that he censured 

 it himself: " These classes," he says, " have the defect of not subt^i^ting without 

 exception." Again, he says that, "if the method be considered rigor. lusly, and 

 not with a view to convenience, it would be necessary to adhere, as Bernard has 

 done, to the sole invariable characters, the IoIjcs of the embryo and the insertion 

 of the stamcnsr And yet, in proportion as the number of species has increased, 

 it has been found that even this last character, taken from the insertion of the 

 stamens, cannot be regarded as exempt from variation. On the other hand, 

 everything has concurred in confirming the grand division given by the lobes of 

 the embryo. Hence, the three groups founded on these lobes (the acotyledoya, 

 vionocotylcdons, and dicotyledons) are far beyond simple classes, properly so 

 called ; they correspond to the evibranchements of the animal kingdoni estab' 

 lishcd by Ouvier, and ought, perhaps, to bo designated by the same name. 

 Under these three grand divisions should be placed the classes proper, eachi 

 formed by the union of several families, in conformity with the judicious reflec- 

 tion of Mr. Robert Brown : " A methodical and at the same time natural ar- 

 rangement of families is perhaps impracticable in the actual state of our knowledge ;: 



