190 



CONVERSATION THE FIFTEENTH. 



CLASS 17. DIADEL'PHIA. PAPILIONA'CEOUS FLOWERS. 



SLEEP OF PLANTS. POD AND LEGU'MEN. LO'- 



TUS CORNICULA'TUS, BIRDS'S-FOOT CLOVER, EXA- 

 MINED. TREFOILS. FURZE. INDIGO. MOVING 



PLANT. ACACIA. CLASS 18. POLYADEL'PHIA. 

 HYPER'ICUM AND ROS^SE'MUM, COMMON TUTS AN, EXA- 

 MINED. CHOCOLATE-NUT ORANGE AND LEMON 



TREES. 



EDWARD. 



I THINK I can tell you the character of the seven- 

 teenth class, Diadelphia: the filaments are all 

 united in two sets. 



MOTHER. 



That is certainly the character given by Linnaeus; 

 but some other circumstances must be attended to, 

 besides the connection of the stamens and number 

 of the sets ; for the flowers of different genera in 

 this class differ from each other in these respects; 

 some having the filaments united in one set only. 

 In doubtful cases the shape of the blossom will 

 enable you to decide ; for it is always irregular, 

 that is, the petals are unequal, and of different 



