548 



DICOTYLEDONES. 



b. Tetracyclicse with epigynous flowers. 

 Family 33. Rubiales. 



The leaves are always opposite or verticillate. The flower is epigy- 

 nous, 2 j o- (or 4-) mercras, with the usual sympetalous diagram ; 



FIG. 581. Cinchona calisayo. Flowering branch. 



2-5 carpels. The inflorescences are frequently dichasial. The 

 sepals are small, reduced to teeth, and become almost entirely 

 suppressed in the higher forms. The flower is regular in Rubiacece 



