EANtrNCTTLTTS. 9 



ceolate. Buds shortly pyramidal, pentagonal. Pet. often more 

 than five. Stam. very short, many. Inner edge of carpels 

 slightly rounded.— ^. M. Bachu (Wirtg.) ; slender, 1. short 

 almost sessile finely divided, pet. narrowly ohovate. — Rivers. 

 /3 rare. P. VI. VII. B. S. I. 



*«* No divided submersed leaves, 

 t Receptacle hispid. 



11. R. intermedius (Knaf, Hiern^ ; 1. subpeltate deeply tritid 

 with cuneate-obovate 2 — 4-tid lobes, pet. scarcely exceeding 

 the caJ., style subulate terminal with a slender base, carp, un- 

 equally obovate much inflated with a nearly terminal point. — 

 iJ. tripartitus E. B. S. 2946. — St. usually suberect, aerial. L. 

 f-circular, lateral lobes with 3, middle with 2 — 4 crenatures. 

 Upper etip. free. Pet. pinkish. Stam. 5 — 10. Style deciduous. 

 Inner edge of carpels much rounded. — Damp ground and wet 

 ditches, rare. A. V . — VIII. E. 



tt Receptacle not hispid. 



12. R. Lenorman'di (Schultz) ; 1. all rouudish cordate with 

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

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

 unequally obovate with a terminal point. — E. £. S. 2930. It. 

 cosndsus Bab. (not Guss.). — St. floating or creeping upon mud. 

 L. not spotted ; lobes very broad at the top, mostly with 2 — 3 

 notches. Upper stip. very broad, J-adnate. Pet. narrow, obo- 

 vate, 5-veined. Stam. 8 — 10. Stj'le 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. \1. — 



vm. E. s. I. 



13. -ffi. hederdceus (L.) ; 1. roundish cordate with 3 — 5 

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

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

 |-oval or j-obovate with a lateral point. — E. B. 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 -S. homceophihts 

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

 —IX. E. S. I. 

 B. Fr.-st. straight ; carp, tranxnersely wrinUed on. the middle uf 



each side basally attached, nectary naked. 



14. R. scelerdtus (L.) ; root fibrous, lower 1. stalked tripartitte, 

 segments blunt crenate, upper 1. tritid linear entire or incise-den- 

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



B 6 



