THE EDITORS MEDICAL BOTANY. 



THIRD CLASS, TRIANDUIA. 



S ugar Cane ( Saccharum officinarum). 



This plant, which belongs to the 

 Jussieuan order, Graminece, is a native 

 of Asia, and also, it is said, of Ame- 

 rica, where it is cultivated. The calyx, 

 as well as the corolla, is two-valved, 

 the flowers being in terminal panicles 

 of many spikes, very downy. Sugar 

 is the expressed juice evaporated of 

 the fresh canes, and undergoes various 

 preparations. 



a Flower, showing the three sta- 

 mens. 



b The seed-organ, surrounded with 

 hair. 



FOURTH CLASS, TETRANDRIA. 



Contrayerva (Dorstenia contrayerva). 



This perennial plant, which be- 

 longs to the Jussieuan order, Urticece, 

 is a native of tropical America. 

 The flowers are very small, closely 

 crowded, and immersed in a common 

 one -leaved fleshy receptacle, where 

 also the seeds are in sockets. The 

 root, which is the part used, is 

 spindle-shaped, knotty, and branchy. 



a Flower opened, showing the 

 four stamens, single forked pistil, 

 and the seed organ. 



