8 1. RANUNCULACE.. 



with repeatedly and closely forked rigid segments all placed in 

 one roundish plane not collapsing, ped. much narrowing exceed- 

 ing 1., fl. large, pet. obovate many-veined nearly contiguous per- 

 sistent, stam. exceeding pistils, stigm. cylindrical, receptacle ob- 

 long, carp, i-ovate compressed rather acute. E. B. S. 2869. 

 St. submersed. L. sheathing, not auricled, remarkably flat rigid 

 and formal. Buds depressed. Stam. 15 20. Receptacle nar- 

 rower than ped. Inner edge of carp, nearly straight. Streams 

 and ponds. P. VI. VIII. 



10. R.fluitans (Lam.); 1. all submersed about twice trifur- 

 cate with very long linear twice or thrice forked nearly parallel 

 segments, ped. narrowing, fl. large, pet. broadly obovate many- 

 veined contiguous persistent, stam. falling short of pistils, stig. 

 Cylindrical, receptacle conical, carp, obovate inflated much rounded 

 at the end laterally apiculate. E. B. S. 2870. St. submersed, 

 usually very long. Petioles and segments of 1. often very long, 

 together a foot in length. Stip. broadly lanceolate. Buds shortly 

 pyramidal, pentagonal. Pet. often more than five. Stam. very 

 short, many. Inner edge of carpels slightly rounded. Rivers. 

 P. VI. VII. 



*** No submersed leaves. Receptacle not hispid. 



11. R. coenosus (Guss.); 1. all roundish cordate with 3 5 

 rather deeply divided lobes which widen from their base, pet. ex- 

 ceeding cal., style terminal upon the ovate-conical ovary, carp, 

 unequally obovate with a terminal point. R. Lenormandi E. B. S. 

 2930. St. floating or creeping upon mud. L. not spotted ; 

 lobes very broad at the top, mostly with 23 notches. Upper 

 stip. very broad, ^-adnate. Pet. narrow, obovate, 5-veined. 

 Stam. 8 10. Style nearly central on the ovary and usually so 

 on the carpel. Inner edge of carp, much rounded towards the 

 top. Shallow ponds or mud." P. VI. VIII. 



12. R. hederaceus (L.) ; 1. all roundish reniform with 3 5 

 shallow rounded lobes widening to their base, pet. scarcely ex- 

 ceeding cal., style prolonging the inner edge of the ovary, carp, 

 i-oval or ^-obovate with a lateral point. E. B. 2003. St. float- 

 ing or creeping upon mud. L. usually spotted ; lobes usually 

 entire or with a central notch, often rather triangular. Stip. 

 narrow, much adnate. Pet. narrow, 3-veined. Stam. 6 8. 

 Style lateral upon both ovary and carpel. Inner edge of carpel 

 nearly straight. Shallow ponds or mud. P. VI. IX. 



B. Fr.-st. straight, carp, transversely wrinkled on the middle of 

 each side, nect. naked. 



13. R. sceleratus (L.) ; root fibrous, lower 1. stalked tripar- 

 tite, segments blunt crenate, upper 1. trifid linear entire or incise- 



