SYNOPSIS OF THE GENERA. 



2. CAKI'LE, [Page 874.] Silicula two jointed, angular, inde- 



hiscent, one celled, one seeded, the lower joint obovate, 

 the upper compressed, crowned by the sessile stigma. 

 Seed solitary in each cell, the lower one pendulous, the 

 upper erect. Cotyledons linear, accumbent. Q 



B. Silicula laterally compressed, ivilh keeled or winged margins. 



3. ISA'TIS, [Page 875.] Silicula oblong, laterally compressed, 



one celled, of two keeled valves, one seeded. Seed with 

 the cotyledons incumbent, oil 



4. SENEBIE'RA, [Page 876.] Silicula two lobed (didyrna), 



laterally compressed, entire or notched at the apex, two 

 celled, each cell single seeded. Seeds roundish, with 

 linear incumbent cotyledons. Q \ \ 



5. LEPID'IUM, [Page 877.] Silicula ovate, or subcordate, of 



two one seeded cells, valves keeled or winged at the back. 

 Petals equal. Filaments simple. Seeds sub-compressed. 

 Cotyledons plane, incumbent. Qll Flowers while, in 

 terminal racemes. 



6. THLAS'PI, [Page 880.] Silicula laterally compressed, the 



apex notched, of two or many seeded cells, valves keeled 

 or winged at the back. Calyx equal at the base. Petals 

 equal. Filaments simple. Cotyledons accumbent. Q 

 Flowers while. 



7. CAPSEL'LA, [Page 882.] Silicula laterally compressed, tri- 



angular, wedge-shaped, of two or many seeded cells, valves 

 sharply keeled. Filaments simple. Cotyledons incum- 

 bent. 1 1 Flowers white. 



8. HuTCHiN'siA, [Page 883.] Silicula laterally compressed, 



elliptical, entire, of two cells, two seeded, valves keeled, 

 and opening at the back. Calyx and petals equal. 

 Filaments simple. Cotyledons accurabent. Q 



9. TEESDA'LIA, [Page 884.] Silicula laterally compressed, 



roundish ovate, emarginate, of two cells, two seeded, 

 valves keeled. Filaments with a scale at the base. 

 Cotyledons accumbeut. Qrr Flo>oers white. 



10. IBE'RIS, [Page 884.] Silicula laterally compressed, trun- 



cato emarginate, of two cells, one seeded, valves keeled 

 and winged. Petals unequal. Filaments simple. Seeds 

 ovate, pendulous. Cotyledons accumbent. Q = 



