48 TETRANDRIA. 



4. AspERULA. Cor. funnel-shaped. Fruit not crowned vvitli 

 the cal. 



3. Sherardia. Cor. funnel-shaped. Frwi^ crowned with the ca/. 

 ttt Flowers of 1 petal, 2- or mamj-seeded, inferior. 



6. Plantago. Cor. 4-cleft, the segments reflexed. Stnm. verv 

 long. Caps, of 2 cells, 2- or many-seeded, bursting all round 

 transversely. 



7. CENTU^X'Ul.tls. Cor. tubular, 4-cleft. Slam, short. Caps. 

 of 1 cell, many-seeded, bursting all round transversely. 



ft it Flowers of 4 petals. 



9. Epimedium. CrtZ. of 4 leaves, caducous. Pef. inferior, with 

 an inflated nectary on the upper side. Pod of 1 cell, 2 valves, 

 many seeds. 



10. CoRNUS. Cal. of 4 teeth. Petals without a nectary, su- 

 perior. Nut of the drupe with 2 cells and 2 seeds. 



'** Perianth single. 



11. Parietaria. Pfi?/o«//i 4-fid., inferior. Filamerits at first 

 incurved, then expanding with an elastic force. Fruit 1 -seed- 

 ed, inclosed in the enlarged perianth. (One or more of the 

 central florets destitute of stamens.) 



12. Alchemij.la. Perianth inferior, 8-cleft, 4 alternate and 

 outer segments the smallest. Fruit 1 -seeded, surrounded by 

 the perianth. 



5. Sanguisorba. Perianth 4-lobed, superior, coloured, at the 

 base having 4 scales or bracteas. Fruit \ — 2-seeded, sur- 

 rounded by the persistent base only of the perianth. 



2. DIGYNIA. 

 (Cuscuta, Pent. Dig.) 

 3. TETRAGYNIA. 



13. Ilex. Cfl/. 4 — 5-toothed. Cor. rotate, 4 — 5-cleft. Stigmas 

 4, sessile. Berry spherical. Nuts 4, 1-seeded. (Some 

 flowers destitute of pistil.) 



16. Sagina. CaZ. of 4 leaves. Petals A (shorter than the co/.). 

 Caps, of 1 cell, 4 valves. 



17. McENCHiA. Cal. of 4 leaves. Petals 4 (as long as the 

 cal.). Caps, of 1 cell, opening with several teeth at the ex- 

 tremity. 



18. Radiola. Cal. many-cleft. Petals 4. Caps, superior, 

 S-valvcd, 8-celled. iSce^ solitary {Sm.). 



14. PoTAMOGETON. Perianth single, of 4 leaves. Anthers 

 sessile, alternating with the dvisions of the perianth. Nuts 4^ 

 1-seeded, sessile. [Flowers numerous, on a spadix, and spa- 

 thaceous.) 



15. RuppiA. Perianth 0. Drupes 4, pedicellate, their nuts 1- 



