6 
1. EASUNCULACEJE. 
1. R. frichoj>/i 1/1/ lit; {Ch&ix em. G.G.); sub^nersed/ . {hl-Ackish 
green) closely trifui cate twt collapsing into a pencil (tassel-like) 
when taken from the water, segments short rigid, ped. not taper- 
ing equalling or slightly exceeding the 1., fl. small, j)et. obovate 
5 — 1-veined not contiguous evanescent, stig. oblong, receptacle 
globular, carp, ^-obovate laterally apiculate compressed. — E. 
B. S. 2968. St. 07. 11. R. divaricatus Schrank. — St. not rising 
out of the water. Upper 1. sessile, all dense. Floating 1. very 
rare (when it is R. Godronn Gren. ! and also Ji. radians Rev.!). 
Stip. i-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. paucistamiiieus (Tsch.) ; snbmersed I. (light green) rather 
loosely trifurcate, tassel-like segments flaccid, floating 1. (rare) 
tripartite with subsessile or stalked wedgeshaped bifid segm., 
ped. not tapering about equalling the 1., fl. small, pet. obovate 
5 — 7-veined not contiguous evanescent, stig. oblong, receptacle 
oblong, carp, .',-obovate sublaterally apiculate inflated, at the 
end. -E. B. S. 2967. R. Drouetii{Y. Sz.).— Bright green. St. not 
rising out of the water. Upper 1. nearly or quite sessile. Float- 
ing 1. rare, evanescent ; lateral segm. stalked an^ 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. ex- 
ceeding 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 from Rescobie referred to R. confervoides 
appears to be a small wholly submersed form of this species. 
of B. xviii. 344.— Ponds and ditches. P. V. VI. E. S. I. 
3. R. keteroj>kyl'lus (Weber, em., Bab.) ; 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., fi. large, 
pet. broadly cuneate-obovate 7 — 9-veined not contiguous persis- 
tent, stig. oblong, receptacle conical, carp, i-obovate, laterally 
pointed. — R. aquatilis Sm. £. B. 101. — St. not rising out of 
the water. Fr.-ped. slender, cui'ved near their base, nearly 
straight above. Floating 1. nearly circular. Stip. much adnate. 
Bvds slightly lU'irressed and rather pentagonal. Fl. becoming 
.starlike. »SVam. ma /(;*/, exceeding pistils. Style hooked. Carp, 
blunt, inner edge straight. — )3. submemns, floating 1. 0, sub- 
mersed 1. more dense and often rather less flaccid, fl. large, 
stam. many. — Ponds and streams. P. V. VI. E. I. 
