48 EXPOSITION OF THE LINNJEAX 



they have only two Stamens), is no objection to it on 

 the score of facility or convenience. It does not pro- 

 fess to be a natural arrangement ; and if in many 

 parts it proves so, more is performed than had been 

 promised, or than could reasonably be expected. The 

 15th and 19th Classes are perfectly natural (except 

 CleomCy badly placed in the former) ; as are, more or 

 less, several Orders, or Sections of Orders, in other 

 Classes. 



Greater technical inaccurracy occurs relative to 

 some characters, founded on connexion of parts. The 

 Stamens, or Filaments, of several Papilionaceous ge- 

 nera, referred with their strictly natural allies, to 

 Diadelphia Decandria, are perfectly monadelphous. 

 fig. 40. We do not mean merely that their two sets 

 of Stamens are united into one at the base ; but there 

 is really no distinction of two sets, in any part of their 

 structure. Indeed if the ten Filaments are any way 

 combined, in a Papilionaceous Flower, such is re- 

 ferred by Linnaeus to the Class and Order just men- 

 tioned. If they are altogether distinct, in which case 

 their whole configuration is totally dissimilar from 

 the flat and membranous Filaments of the true Dia- 

 ddphia, they belong, though Papilionaceous, to the 

 10th Class. 



Culture, and other accidents, produce changes 

 against which no principles of arrangement can pro- 

 vide. Such causes peculiarly affect number in the 

 parts of a Flower, the Stamens, and Pistils, as well 



