OF BRITISH PLANTS. 417 



21. Barbarea, 264, 275. 



14. Dentaria, 264, 271. 22. Erysimum, 264, 275. 



15. Cardamine, 264, 271. 23. Hesperis, 264, 276. 



16. Arabis, 264, 272. 24. Cheiranthus, 264, 276. 



17. Turritis, 264, 273. 25. Brassica, 264, 277. 



18. Nasturtium, 264, 273. 26. Sinapis, 264, 277. 



19. Sisymbrium, 264, 274. 27. Raphanus, 264, 279. 



20. Matthiola, 264, 274. 



Order VII. RESEDACE^E. 



Sepals four, five, or six, persistent. Corolla irregular, petals four 

 or six, lacerated. Stamens ten to twenty-four, inserted upon a glan- 

 dular irregular disk. Ovary sessile, three-lobed, one-celled, with 

 three parietal placentas. Fruit opening at an early stage at the 

 end. 



1. Keseda, 210, 212. 



Order VIII. CISTINE^E. 



Sepals five, unequal, the inner three with twisted aestivation. Pe- 

 tals five, deciduous, corrugated and twisted. Stamens numerous. 

 Ovary one-celled, or many-celled, style filiform, stigma simple. 

 Capsule valvate. Seeds numerous. 



1. Helianthemum, 227, 232. 



Order IX. VIOLACE^E. 



Sepals five, often extended at the base. Petals five. Stamens 

 five, with dilated filaments, and crested anthers. Ovary one-celled, 

 with three parietal placentae, style with a hooded stigma. Capsule 

 of three valves. 



1. Viola, 111, 127. 



Order X. DROSERACE^}. 



Sepals five, equal. Petals five, regular. Stamens five or ten, 

 free. Styles three or five. Ovary free. Capsules with three or 

 five valves. 



1. Drosera, 114, 162. 



Order XI. POLYGALE.E. 



Sepals five, the two inner larger and petaloid. Petals generally 

 three. Stamens with their filaments united below, but separating 

 above into two parcels. Anthers one-celled, opening by a pore at 

 the tip. Capsule one- celled or three-celled, with placentas in the 

 axis. Seeds pendulous. 



1. Polygala, 285, 286. 



Order XH. FRANKEOTACE^E. 



Sepals four or five, united into a furrowed tube below. Petals 

 five, clawed, with appendages at the base of the limb. Stamens five 

 or more, free, two-celled. Capsule one-celled, three-valved, with 

 three parietal placentae. Seeds numerous, minute. 



1. Frankenia, 163, 175. 

 2 N 



