Class XV. Order II. 



Class XV. TETRADYNAMIA. Six stamens, 

 four long and two short. 



Order I. ' SILICULOSJ. Seeds in a silicle. 



193. LEPIDIUM. Silicle elliptic, emarginate, 

 the valves carinate but not margined. 



193. THLASPI. Silicle inversely heart shaped, 

 ihe valves carinate and margined. 



194. BUNIAS. Silicle deciduous without open- 

 ing, somewhat four sided, two of its angles more 

 acute. 



Order II. SILIQUOSA. Seeds in a silique. 



195. RAPHANUS. Silique cylindrical, swelling 

 at the seeds, somewhat jointed. 



196. CARDAMINE. Silique bursting elastically, 

 the valves revolute, and equal to the partition. 



197. SISYMBRIUM. Silique cylindrical, open- 

 ing with nearly straight valves 5 valves equalling 

 the partition. 



198. ERYSIMUM. Calyx closed; stigma capi- 

 tate; silique columnar, square. 



199. SINAPIS. Calyx spreading; silique cy- 

 lindrical, with the partition longer than the valves. 



