VI. CRUCIFER^I. 25 



Sfi / Tod slightly winged, orbicular. (Radicle accumbent) . . 18. TEBSDALIA, 



\ Pod not winged, oval. (Radicle oblique) ..... 20. HOTOHINSIA. 



( Pod opening in two valves. Upper leaves undivided ..... 28 

 27 < Pod indehiscent, or separating laterally into two nut*. Trailing plant, with 



( all the leaves pinnate ..... , . . .23. SENEBIERA, 

 9S f Two adjoining outer petals much larger than others . . . 19. IBERIS. 



\ Petals all equal .... ..... 22. LEPIDIUM. 



90 



\Podglobular, cylindrical, or conical ...... 31 



ox* f Pod oblong, pendulous. Tall plant, with yellow flowers . . .24. ISATIS. 

 \ Pod small, broad. Trailing plants, with small white flowers . 23. SENEBIERA. 

 .Pod globular, 1 -seeded, raised on a short thick stalk within the calyx. 



26. CRAMBE. 

 31 -| Pod of two joints, the upper mitre-shaped and 1-seeded, the lower pike- 



shaped, with an imperfect ovule ....... 25. CAKILB. 



^Pod of several seeds, separated by transverse partitions . . 27. RAPHANUS. 



These Genera are distributed into the following Tribes : 



1. AR ABIDES. Pod siliquose. Radicle accumbent Genera: I. MATTHIOLA; 

 2. CHEIRANTHUS ; 3. BARBAREA ; 4. NASTURTIUM ; 5. ARABIS ; 6. CARDAMINBT. 



2. SISYMBRIE.S. Pod siliquose. Radicle incumbent Genera: 7. HESPERIS; 

 a SISYMBRIUM ; 9. ALLIARIA ; 10. ERYSIMUM. 



3. BRASSICEJB. Pod siliquose. Radicle conduplicate. Genus : 11. BRASSICA. 



4. ALYSSINE^E. Pod siliculose, the partition across the broadest diameter. 

 Radicle accumbent Genera : 12. COCHLEARIA ; 13. ALYSSUM ; 14. DRABA. 



5. CAMELINE^!. Pod siliculose, the partition across the broadest diameter. 

 Radicle incumbent. Genera : 15. CAMELINA ; 16. SUBULARIA. 



6. THLASPIDE^E. Pod siliculose, the partition across the narrowest diameter. 

 Radicle accumbent Genera : 17. THLASPI ; 18. TEESDALIA ; 19. IBERIS. 



7. LEPIDINEJ!. Pod siliculose, the partition across the narrowest diameter. 

 Radicle incumbent or nearly so. Genera : 20. JHuTCHiNSiA ; 21. CAPSELLA ; 22. 

 LEPIDIUM; 23. SENEBIBRA. 



8. LOMENTOS2G. Pod lomentose. Genera: 24. ISATIS-, 25. CAKILE; 26. CRAMBE; 

 27. RAPHANUS. 



Several European and Asiatic Crucifers belonging to other genera 

 are cultivated in our gardens ; among them the most common are the 

 Honesty (Lunaria) and an Eastern species of Aubrietia, both belonging 

 to the Alyssinece. _ 



I. MATTHIOLA. STOCK. 



Annuals or perennials, more or less hoary with stellate hairs, the 

 leaves entire or sinuate, the flowers rather large, usually purple, never 

 yellow. Calyx erect, distinctly bisaccate. Petals spreading, on long 

 'erect claws. Pod long and narrow, compressed or nearly cylindrical. 

 Stigmas sessile, short, but erect, and parallel to each other, having 

 sometimes a horizontal horn at the base of each. Seeds more or less 

 flattened, usually surrounded by a narrow wing forming one row. 

 Radicle accumbent. 



Mostly sea-coast plants from western Europe and the Mediterranean. 

 They formerly formed one genus with Cheiranthus, from which they 

 are chiefly distinguished by the erect stigmas, and the colour of the 

 flowers. 



Stem erect, much branched. Leaves entire ..... 1. M. incana. 

 Stem spreading. Lower leaves sinuate, or coarsely toothed . . 2. M. sinuata. 



1. M. incana, Br. (fig. 48). Common or Queen S., Oittiflower. Erect, 

 usually perennial, and more or less woody at the base, but not of long 

 duration ; 1 to 2 feet high, with hard, slightly spreading branches. 

 Leaves oblong-linear, obtuse, quite entire, soft and hoary on both sides, 

 with short crisped hairs. Flowers purple or reddish, rather large, th 



