DIV. n 



ANGIOSPERMAE 



705 



logical interest on account of the nitrogen-fixing bacteria harboured in their 

 leaves. The association is higher than that of the Leguminosae with the bacteria 

 in their root-nodules in that the bacteria here are present in the seeds and are thus 

 handed on to a new generation. 



OFFICIAL. Cinchona succirubra yields CINCHONAE RUBRAE CORTEX. QUININE 



FIG. 765. Cinchona succirubra (nat. size). OFFICIAL. (After SCHUMANN and ARTHUR MEYER.) 



is obtained from this and other species of Cinchona. Uragoga (Psychotria] 

 Ipecacuanha yields IPECACUANHA. CATECHU is obtained from Ourouparia 

 (Uncaria) gambir. 



Family 2. Caprifoliaceae. -Woody plants, usually without stipules. Viburnum 

 has actinomorphic flowers with a trilocular ovary. The fruit contains only one 

 seed. The sterile marginal flowers, which are alone represented in cultivated forms, 



2z 



