30 LOMENTOSE < 



CRUCIFERiK. 41 



22 f Pod nearly orbicular 14. Alyssum. 



1 Pod considerably longer than broad 15. Draba. 



9 „ f Two or more seeds in each cell of the pod 24 



i One seed only in each cell 28 



04 f Leaves entire 25 



I Leaves more or less pinnate ^ 26 



rPod winged all round. (Cotyledons accumbent.) . . 18. Pennycress. 

 25 <{ Pod obcordate or wedge-shaped, not winged. (Cotyledons incumbent.) 



L 22. Capsel. 

 2fi J" Two seeds in each cell 27 



I Many seeds in each cell. (Cotyledons incumbent.) ... 22. Capsel. 

 g^ f Pod slightly winged, orbicular. (Cotyledons accumbent.) 19. Teesdalia. 



I Pod not winged, oval. (Cotyledons oblique.) . . . .21. Hutchinsia. 



("Pod opening in two valves. Upper leaves undivided 29 



28 <j Pod indehiscent, or separating laterally into two nuts. Trailing plant, 



L with all the leaves pinnate 24. Senebiera. 



oq r Two adjoining outer petals much larger than others . 30. Candytuft. 



I Petals all equal 23. Cress. 



Pod flattened 31 



Pod globular, cylindrical, or conical 32 



„, f Pod oblong, pendulous. Tall plant, with yellow flowers . . 25. Woad. 



I Pod small, broad. Trailing plants, with small white flowers 24. Senebiera. 



("Pod globular, one-seeded, raised on a short, thick stalk within the calyx. 



27. Crambe. 

 32 <j Pod of two joints, the upper mitre-shaped and one-seeded, the lower 



spike-shaped, with an imperfect ovule » 26. Cakile. 



LPod of several seeds, separated by transverse partitions . . 28. Radish. 



These genera are distributed into the following Tribes : — 



1. Ar abided. Pod siliquose. Cotyledons accumbent. Genera : — 1. Stock ; 

 2. Wallflower ; 3. Wintercress ; 4. "Watercress ; 5. Roczcress ; 6. 

 blttercress ; 7- toothcress. 



2. Sisymbrieje. Pod siliquose. Cotyledons incumbent. Genera :— 8. 

 Hesperis ; 9. Sisymbrium ; 10. Alliaria ; 11. Erysimum. 



3. Brasstce-S:. Pod siliquose. Cotyledons conduplicate. Genus : — 12. 

 Brassica. 



4. Alyssine^:. Pod siliculose, the partition across the broadest diameter. 

 Cotyledons accumbent. Genera : — 13. Cochlearia ; 14. Alyssum ; 15. 

 Draba. 



5. Cameline^:. Pod sihculose, the partition across the broadest diameter. 

 Cotyledons incumbent. Genera: — 16. Camelina ; 17. Awl wort. 



6. ThlaspidEjE. Pod siliculose, the partition across the narrowest diameter. 

 Cotyledons accumbent. Genera :— 18. Pennycress ; 19. Teesdalia ; 20. 

 Candytuft. 



7. Lepidine^:. Pod siliculose, the partition across the narrowest diameter. 

 Cotyledons incumbent, or nearly so. Genera : — 21. Hutchinsia ; 22. Cap- 

 sel ; 23. Cress ; 24. Senebiera. 



YOL. I. E 



