RUBIACEAE 295 



About 240 genera and 4,500 species, mostly in the tropics. 



Included under this family are the Coffee and Chincona trees. From 

 the. bark of the latter quinine is obtained. About 40 or 50 genera are 

 under cultivation, among them Gardenia (with waxy, camelia-like 

 flowers), Oephalanthus, a shrub, called the Button Bush on account of 

 its fragrant flowers which are in globular heads, Houstonia and Michella 

 are common garden favorites. 



KEY TO GENERA 



I. Flowers in corymbose panicles, the inflorescence with a white 

 petaloid bract developed from the sepal of a flower persistent 

 in the fruit '. Emmenopterys. 



II. Flowers in globose heads, solitary or arranged in panicles; 

 inflorescences and fruit not accompanied by petaloid bract. . . . 

 Adina. 



ADINA 



Trees or shrubs. Leaves petioled with large caducous stipules. 

 Flowers in solitary or panicled globose heads. Calyx tube angular, 5 

 parted; corolla tubular, 5 lobed; stamens 5, inserted on the mouth of the 

 corolla; ovary 2 celled; style filiform, with capitate stigma ; ovules many 

 in each cell. Fruit a capsule, dehiscent into 2 valves, many seeded. 

 Seeds long, winged. 



About 6 species in the tropics of Asia and America. At least 2 other 

 species are found in China in addition to the following. 



Adina cordifolia Hooker. 



Tree. Leaves coriaceous, orbicular, acuminate, cordate, pubescent 

 beneath, 10-13 cm. long. Inflorescence in a solitary head, about 2-3 cm. 

 in diameter, on a stout peduncle 2.5-5 cm. long. Flowers yellow ; corolla 

 downy. Capsule cuneate, downy, about 4 mm. long, 6 seeded. 



India to Yunnan. 



Adina raeemosa Miquel. 



Tree to 15 m. tall. Leaves ovate to oblong, acuminate, shiny, 

 glabrous. Inflorescence capitate. Fruit in racemes. 



