CLASS XV. 

 TETRAD YNAMIA, 



" The spleen is seldom felt where Flora reigns." 



COWPER. 



" I have cured weak stomachs by engaging the persons in the study of 



Botany, and particularly in the investigation of our native plants." Dr 



CULLEN. 



I. SILICULOSA. 



* Cotyledons accumbent. 



191. DRABA. Pouch entire, laterally compressed, valves nearly 

 flat ; seeds numerous. 



198. CIIAHBE. Pouch globose, stalked, coriaceous, of 1 cell, 

 without valves, deciduous ; seed solitary. 



197. CAKILE. Pouch angular, of 2 joints, each of 1 cell, with- 

 out valves, the uppermost deciduous ; seed solitary. 



195. COCHLEARIA. Pouch nearly entire, turgid, rugged, of 2 

 valves ; seeds numerous. 



194. THLASPI. Pouch cloven, inversely heart-shaped, the valves 

 with a bordered keel ; seeds numerous. 



