ORDER 80LANEJE, OR NIGHTSHADE TRIBE. 



481 



divisions ; there are five equal stamens ; and the ovarium haa 

 two cells, in each of 

 which is a number of 

 ovules. In all these 

 characters, there is 

 nothing to mark the 

 distinction of this 

 order from the Gen- 

 tianese, in which the 

 structure of the flower 

 is almost exactly simi- 

 lar. In the Linnyean 

 classification, how- 

 ever, they are distin- 

 guished by this, 

 that the style is alto- 

 gether single in the 

 Solaneas, so that the 

 genera belonging to it 



are placed in the FIG. 174 BRANCH OF ATROPA BELLADONNA,! 

 NIGHTSHADE, with buds, flowers, and fruit. 



order Monogyma of 

 the class PENTANDRIA, 

 whilst many of those 

 of the order Gen- 

 tianeae, in which the 

 style is cleft at the 

 top, belong to the 

 order Digynia of the 

 same class. A more 

 important and con- 

 stant distinction, how- 

 ever, may be drawn 

 from the arrangement 



of the leaves, which cut open, showing the stamens inserted on it. B, calyx, 



. with ovarium cut across. C, pistil, with a, origin of 



are Opposite m the ca iy x ; 6, origin of corolla ; c, ovarium ; d, style ; and e, 



Gentian tribe, and al- sti ma - 



ternate in the Nightshade tribe. It is well, on account of the 



FIG. 175 PARTS OP FLOWER OF THB SAMK. A, corolla 



