192 TETRADYNAMIA. 



4. Thlaspi. Pniich compressed, emarginate ; the valves keel- 

 shaped (often winged), many-seeded. Filaments without teeth 

 distinct. Cat. une(]ual in its insertion, patent. Br. 



5. Teesdalia. Pouch emarginate, the valves keel-shaped ; cells 

 2-seeded. Filaments with a little scale on their inside. 



6. Lepidil'M. Pnjich with 1 -seeded cells, their valves keel- 

 shaped. Petals equal. Br. 



7. CocHLEARiA. Poiicli subovate, many-seeded, their valves 

 turgid. Seeds not margined, their cotyledons accumbent. The 

 shoiter Ji laments without teeth. Cat. patent. Br. 



8. SuBULARiA. Po2icho\'ii], pointless (Silic. mi/fica, Br.), many- 

 seeded ; valves turgid. Cotyledons incumbent, linear, bipar- 

 tite =^ (/'/c?7/7-e5). Br. 



9. Draha. Pouch entire, oval ; valves plane, or a little convex; 

 cells nranv-seeded. Seeds not margined; cotyledons accum- 

 bent. Filainents without teeth. Br. 



10. Caimeljna. Pouch subovate, many-seeded ; their valves tur- 

 gid. Cotyledons incumbent. Filaments without teeth. Br. 



2. SILIQUOSA. 



11. Cardamine. Pols' linear, with the margins truncated ; valves 

 plane, nerveless (often bursting elastically), narrower than the 

 dissepiment. Br. 



12. Ara]5IS. /W linear, crowned with the nearly sessile stigma ; 

 valves veined or nerved. Seeds in one row. Cotyledons ac- 

 cumbent. Cal. erect. Br. 



13. TuRRiTis. Pod elongated, 2-edged ; valves nerved and 

 keeled. Seeds in two rows. Cotyledons accumbent. Br. 



14. Baruarea. Pofi? ^-edged. Co/y/^/o??^ accumbent. Seeds 

 in one row. Cal. erect. Small glands placed between the 

 shorter filaments. Br. 



15. NASTfiRTiUM, Po(/ rounded (sometimes short) ; valves con- 

 cave, nerveless, not carinated. Co/?/ /et/o/z,? accumbent. Cal. 

 patent. Br. 



16. Sisymbrium. Pod rounded or angular. Cotyledons incum- 

 bent fsometimes obliquely), plane. Cal. patent (sometimes 

 nearly erect). Br. 



17. Erysimum. Poc? 4-sided. 5i'^^J.« not margined. Cotyledons 

 incumbent. Stigvta capitate, sometimes notched, with the 

 lobes patent. Cal. closed. Br. 



18. Cheiranthus. Po^i? compressed or two-edged. Cotyledons 

 accumbent. Cal. closed ; opposite leaflets saccate at the base. 

 Stigma placed upon a style, two-iobed, with the lobes patent 

 or capitate. Br. 



* Some cotifledons in this class are tripartite, as in Lqiidhim sativum, and 

 the genus Heliophitn, according to Brown. 



