LINN*AN ARTIFICIAL SYSTEM. 1-17 



The different tribes of helicteres or screw-tree, pentapetes, pte- 

 rnspermum, and a few more, are the constituents of this order. 



109. Polyandria : In this order are included such 

 plants of the general character, as have flowers with 

 more than twenty stamens. 



This order contains a much greater number of genera than any of 

 the others in the class. Among these will be found, the sour-gourd 

 or monkey-bread-tree, the tribes of silk-cotton-tree, mallow, marsh- 

 mallow, lavatera, hibiscus, camellia, and others. The most known 

 plants may be, the common marsh-mallow, the common mallow, the 

 tree-mallow a species of lavatera, the China rose, a species of 

 hibiscus, and the camellia japonica or common camellia. 



CLASS XVII. DIADELPHIA. 



110. Character ; With plants belonging to this 

 class, the flowers are either papilionaceous or butterfly- 

 shaped, or else the stamens are inserted into two sets 

 by their filaments. (F. 190.) 



The structure and general aspect of plants arranged in this class, 

 are very similar in their natural resemblance. They are inserted by 

 Linnaeus in his natural order papilionaceac, and by Jussieu in his 

 vast order leguminosce. 



111. Division: There are four orders of plants in 

 this class ; viz. pentandria, hexandria, octandria, and 

 decandria, all established on the number of the stamens. 



112. Pentandria : This order is constituted by a 

 rare little South American plant, the monnieria, having 

 two filaments, the upper with two anthers, and the lower 

 with three. 



