420 ARRANGEMENT OE THE GENERA 





Order XXV. RHAMNE^E. 



Calyx four- or five-cleft, valvate. Petals four or five, inserted 

 into the throat of the calyx. Stamens four or five, opposite to the 

 petals. Ovary wholly or in part superior, with two or four cells, 

 and surrounded by a glandular disk. Seeds solitary, erect. 



1. Khamnus, 111, 132. 



Order XXVI. LEGUMINOSE^. 



Calyx of four or five sepals, more or less united. Corolla papilio- 

 naceous (in all the British genera), inserted into the base of the 

 calyx, the odd petal superior. Stamens ten, monadelphous or dia- 

 delphous. Ovary free, one-celled. Fruit a legume. 



LOTE-ffi. VlCTE^E. 



1. Ulex, 285, 288. 8. Vicia, 285, 292. 



2. Genista, 285, 287. 9. Lathyrus, 285, 291. 



3. Ononis, 285, 289. 10. Orobus, 285, 290. 



4. Anthyllis, 285, 289. HEDYSAREJE. 



5. Medicago, 285, 300. 11. Ornithopus, 285, 294. 



6. Trifolium 286, 296. 12. Arthrolobium, 285, 294. 



7. Astragalus, 285, 295. 13. Hippocrepis, 285, 295. 



14. Hedysarum, 285, 295. 



Order XXVH. ROSACES. 



Calyx four- or five-parted, lined below with a disk. Petals five, 

 equal, inserted into the calyx. Stamens generally numerous, an- 

 thers two- celled, opening longitudinally. Carpels many, rarely 

 solitary, one- celled, with one, two, or more seeds ; styles simple, 

 often lateral. 



AMYGDALE^E. 9. Sibbaldia, 114, 161. 



1. Prunus, 213, 214. 10. Potentilla, 214, 223. 



SPIR.E2E. 11. Comarum, 214, 226. 



2. Spirtea, 213, 216. 12. Fragaria, 213, 222. 



DRYADEJE. 13. Rubus, 213, 220. 



3. Dryas, 213, 225. ROSEJE. 



4. Geum, 213, 225. 14. Rosa, 213, 217. 



5. Sanguisorba, 96, 103. POME^E. 



6. Poterium, 344, 362. 15. Mespilus, 213, 215. 



7. Agrimonia, 210, 211. 16. Pyrus, 213, 215. 



8. Alchemilla, 96, 105. 



Order XXVIII. LYTHRARIE^E. 



Calyx tubular, lobed. Petals deciduous, between the lobes of 

 the calyx. Stamens equalling the petals in number, or two, three, 

 or four times as many, and inserted into the tube of the calyx. 

 Ovary free, three- or four-celled, with a central placenta, and nu- 

 merous seeds. Capsule membranous, usually one-celled. 



1. Lythrum, 210, 211. 2. Peplis, 163, 175. 



Order XXIX. ONAGRARLE. 



Calyx tubular, adnate to the ovary entirely or hi part, two- or four- 

 lobed. Petals as many as the lobes of the calyx, twisted, inserted at 

 the top of the tube. Stamens two, four, or eight, inserted with the 



