6 1. EANUNCTJLACEJE. 



1. R. trichophyl'lus (Chaix) ; submersed I. (blackish green) 

 closely trifurcate not collapsing into a pencil (tassel-like) when 

 taken from, the water, segments short rigid, ped. not tapering 

 equalling or slightly exceeding the 1., fl. small, pet. obovate5 

 7 -veined not contiguous evanescent, stig. oblong, receptacle 

 globular, carp, j-obovate laterally apiculate compressed. E. 

 It. S. 2968. St. 67. 11. R. divaricates Schrank. St. not rising 

 out of the water. Upper 1. sessile, all dense. Floating 1. very 

 rare (when it is R. Godronii Gren. ! and also R. radians Rev. !). 

 Stip. j-adnate, large, round, auricled. Fr.-ped. short, thick, 

 arching, most curved near their base. Buds globose. Fl. star- 

 like. Stam. exceeding the pistils. Stig. short but lengthening. 

 Receptacle as thick as peduncle. Carp, a little narrowed at the 

 end. Ponds and ditches. P. V. VI. Water Fennel. E. S. I. 



2. R. Drouet'ii(F. Schultz) ; submersed I. (light green) rather 

 loosely trifurcate, tassel-like segments flaccid, floating 1. (rare) 

 tripartite with subsessile or stalked wedgeshaped bind segm., 

 ped. not tapering about equalling the 1., fl. small, pet. obovate 

 o 7-veined not contiguous evanescent, stig. oblong, receptacle 

 oblong, carp. |-obovate sublaterally apiculate inflated at the 

 end. E. B. S. 2967. Bright green. St. not rising out of the 

 water. Upper 1. nearly or quite sessile. Floating 1. rare, 

 evanescent ; lateral segm. stalked and in a different plane from 

 the usually sessile deflexed middle segm. Stip. much adnate, 

 large, auricled. Fr.-ped. short, slender, bent at the base, nearly 

 straight above. Buds oblong. Fl. starlike. Stam. exceeding 

 the pistils, few. Fr. -receptacle as thick as peduncle. Carp, 

 with the edge flattish at the end, base of style small often 

 subcentral. The plant fromRescobie referred to R. confervoides 

 appears to be a small wholly submersed form of this species. 

 J.offi.xvm. 344. -Ponds and ditches. P. V. VI. E. S. I. 



3. R. heterophyl' his (Fries) ; submersed I. loosely trifurcate, 

 segments long tassel-like, floating 1. subpeltate tripartite with 

 sessile or stalked wedgeshaped 3 5-lobed segm., ped. not 

 tapering but narrowed scarcely exceeding the 1., fl. large, pet. 

 broadly cuneate-obovate 7 9-veined not contiguous persistent^ 

 stig. oblong, receptacle conical, carp, ^-obovate, laterally pointed. 

 R. aquatilis Sm. E. B. 101. St. not rising out of the water. 

 Fr.-ped. slender, curved near their base, nearly straight above. 

 Floating 1. nearly circular. Stip. much adnate. Buds slightly 

 depressed and rather pentagonal. Fl. becoming starlike. titam. 

 many, exceeding pistils. Style hooked. Carp, blunt, inner 

 edge straight. /3. submersws, floating 1. 0, submersed 1. more 

 dense and often rather less flaccid, fl. large, stam. many. Ponds 

 and streams. P. V. VI, E. I. 



