6. CRUCIFER^. 19 



9. Hespbris. Pod quadrangular or subcompressed ; valves 

 keeled, somewhat 3-veiiied. Stigma of 2 closely converging 

 erect elliptical obtuse lobes. Seeds in a single i-ow. 



10. Sisymbrium. Pod terete or rarely tetragonal; valves 

 convex, with 3 longitudinal veins. Stigma entire. Seeds 

 in a single row, smooth ; seed-stalk filiform. — S. thalianum 

 has a tetragonal pod and valves with 1 strong conspicuous 

 rib. 



11. Alliaria. Pod terete ; valves convex, with 3 longitu- 

 dinal veins, the middle one prominent and strong, the 2 

 lateral slender and branching. Stigma entire. Seeds in a 

 single row, striated; seed-stalk flattened, winged. 



12. Erysimum. Pod tetragonal ; valves Tpromiueatly keeled, 

 with 1 longitudinal vein. Stigma obtuse, entire or slightly 

 emarginate. Seeds in a single row ; seed-stalk filiform. 



Tr. III. BRASSICEJE. Cotyledons eonduplicate longitudi- 

 nally folded in the middle ; radicle dorsal, within the fold. 



13. Brassioa. Cal. erect. Pod terete or angular. Seeds glo- 

 bose, in a single row. 



14. SiNAPis. Cal. patent. Pod terete or angular. Seeds in 

 a single row. 



15. DiPLOTAXis. Cal. patent. Pod compressed. Seeds 

 oval or oblong, in 2 rows. 



Suborder II. LATISEPTiE. 



Pouch (silicle) short, opening with two valves : dissepiment in 

 its broadest diameter. 



Tr. IV. ALYSSINEjE. Cotyledons accumbent. 



16. Alyssum. Pouch roundish or oval, compressed. Seeds 

 2 — 4 in each cell. Filaments toothed or the shorter ones 

 with a gland or subulate process on each side at the base. 



17. KoNiGA. Pouch oval, compressed. Seeds 1 — 2 in each 

 cell. Filaments simple. Hypogynous glands 8. Carpo- 

 phorum 0. 



18. Draba. Pouch oval or oblong, slightly convex. Seeds 

 many in each cell, not margined, in two rows. Filaments 

 simple. 



19. Cochlearia. Fouch glohose ; valves very convex, ioTsal 

 vein prominent. Seeds many. Filaments simple. 



20. Armoracia. Pouch elliptical or globose ; valves very 

 convex, no vein. Seeds many. Filaments simple. 



