10 1. KANTJNCFLACEJK. 



*** Usually no divided submersed leaves ; receptacle not 

 hispid. 



14. It. Lenormaridi (F. Schultz) ; 1. all roundish cordate with 

 3 5 rather deeply divided lobes which widen from their base, pet. 

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

 unequally obovate with a terminal point. E. JB. S. 2930. R. 

 c&nosus Bab. (not Guss.). St. floating or creeping upon mud. 

 L. not spotted^ often opposite before the plant flowers ; lobes 

 very broad at the top, mostly with 2 3 notches. Upper stip. 

 very broad, ^-adcate. 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. E. S. I. 



15. R. hederdceus (L.) ; 1. roundish cordate with 3 5 

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

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

 J-oval or i-obovate with a lateral point. E. E. 2003. St. 

 floating 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. When floating it is JR. omoiophyllus 

 (Ten.). R. ccenosus (Guss.). Shallow ponds or mud. P. VI. 

 -IX. E. S. I. 



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

 each side basally attached, nectary naked. 



16. R. scelerdtus (L.) ; root fibrous, lower 1. stalked tripartite, 

 segments blunt crenate, upper 1. trih'd linear entire or incise-den- 

 tate, calyx reflexed, head of fr. oblong, carp, minute. E. B. 

 681. R. iii. 11. Fl. very small, pale yellow. Nect. round, 

 open, bordered all round, rarely not bordered above. Lower 

 1. broad, glabrous, shining. Stem 1 2 feet high, thick. By 

 and in ditches and ponds. A. VI. IX. Celery-leaved Crow- 

 foot. E. S. I. 



C. Fr.-st. straight ; carp, not transversely wrinkled, basally 

 attached. 



\R. alpestris and R. gramineus were probably recorded through 

 mistakes.] 



t L. undivided, fl. yellow, nectary nearly or quite naked 

 bordered. L. nearly parallel-veined. 



