OF BRITISH PLANTS. 417 



SILIQUOSJE. 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^. 



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

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

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

 rietal placentas. Fruit opening at an early stage at the end. 



1. Reseda, 210, 212. 



Order VIII. CISTINE.E. 



Sepals five, unequal, the inner three with twisted aestivation. Petals 

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

 one-celled, or many-celled, style filiform, stigma simple. Capsule val- 

 vate. 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 XII. FRANKENIACE^. 



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 



