SVNOPSIS OF THE GENERA. 



**** Perianth double. Corolla of four petals. 



11. Epime'DIUM, [Page 196.] Calyx of four pieces, deciduous, 



petals four, inferior, with a large inflated nectary at the 

 base. Pod oblong, two valved, one-celled, many seeded. 



12. CoR'NUS, [Page 189.] Calyx of four deciduous pieces. 



Corolla superior. Drupe with a two-celled, two-seeded, 

 nut. 



( See Euonytmis in Class V. ; Cardamine and Coronopus in 



Class XV.) 



***** Perianth double. 



13. Parieta'ria, [Page 199.] Floivers polygamous, surrounded 



by a two-leaved involucrum. Perianth single, inferior, 

 four-cleft, persistent. Stamens at first incurved, at length 

 expanded by the elastic force of the filaments. Fruit 

 single seeded, enclosed by the enlarged perianth. 



14. Alchemi'lla, [Page 201.] Perianth inferior, eight-cleft; 



the four outer alternate ones smallest. Fruit a solitary or 

 double nut, surrounded by the persistent perianth. Seed 

 suspended. 



lo. IsNARDiA, [Page 202.] Calyx superior, the limb of four 

 lobes, persistent. Petals four wanting. Stigma capitate. 

 Capsule obovate, with four angles, four valves, four cells, 

 and many seeded. 



16. Sangdisor'ba, [Page 203.] Perianth superior, of four 



coloured lobes, with two or four scales at the base. Nuts 

 one or two, surrounded by the dry persistent tube of the 

 perianth. Seed suspended. 



Order II. Digynia. — 2 Pistils. 



17. BuFFONiA, [Page 204.] Calyx of four pieces. Corolla of 



four entire petals. Capsule compressed, one-celled, two- 

 valved, two-seeded. 

 (See Alchemilla, in Order II. Gentiana and Cuscuta in Class V.) 

 Order III. Tetragynia. — 4 Pistils. 



18. Tlex, [Page 205.] Calyx persistent, of four or five teeth. 



Corolla of four or five petals, distinct or combined at the 

 base. Stamens four, sometimes five. Fruit fleshy, con- 

 taining four or five hard one-seeded nuts. Seeds inverted. 



19. Potamo'geton, [Page 207.] Floivers in spikes, arising from 



a sheathing bractece, or spathce. Perianth single of four 



