6 
1. EAUUNCUIACE^. 
evanescent, stig. oblong, receptacle oblong, carp, ^-obovate late- 
rally apiculate compressed. — St. 67. 11. — St. not rising out of the 
water. Upper 1. sessile, all dense. Floating 1. have not been 
found in Britain but are tripartite with short subsessile or 
stalked deeply lobed wedgeshaped segm. all in one plane 
(R. radians Rev. R. Godronii Gren. !). Stip. ^-adnate, large, 
round, auricled. Buds globose. Fl. starlike. Stam. exceeding 
the pistils. Stig. short but lengthening. Receptacle as thick as 
pedimcle. Carp, a little narrowed at the end. — Ponds and 
ditches. P. V. VI. Water Fennel. E. 
2. R. Drouet'ii (F. Schultz) ; submersed I. (light green) rather 
closely trifurcate, segments flaccid collapsing, floating 1. (rare) 
tripartite with subsessile or stalked wedgeshaped bifid segm., ped. 
not narrowing about equalling the 1., fl. small, pet. obovate 5 — 7- 
veined not contiguous evanescent, stig. oblong, receptacle oblong, 
carp. 5-obovate sublaterally apiculate inflated at the end. — Bright 
green. St. not rising out of the water. Upper 1. nearly or quite 
sessile. Floating 1. rare ; lateral segm. stalked and in a difler- 
ent plane from the usually sessile deflexed middle segm. Stip. 
much adnate, large, aiiricled. 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 
subcenti'al. — Ponds and ditches. P. V. VI. E. 
3. R. heterophgl' lus (Sibth.) ; submersed I. loosely trifurcate, 
segments long collapsing, floating 1. subpeltate tripartite with 
sessile or stalked wedgeshaped 3 — 5-lobed segm., ped. not 
naiTowing scarcely exceeding the 1., fl. large, pet. broadly cimeate- 
obovate 7 — 9-veined not contiguous persistent, stig. oblong, 
receptacle cotiical, carp, ^-obovate laterally pointed. — It. aquatilis 
E. B. 101. — St. not rising out of the water. Floating 1. nearly 
circular, sometimes 0. Stip. much adnate. Buds slightly de- 
pressed and ratlier 5-agonal. Fl. becoming starlike. Stam. 
many, exceeding pistils. Style hooked. Cai-p. blunt, inner 
edge straight. — Ponds and streams. P. V. VI. E. 
4. R. confOsus (Godr.) ; submersed I. loosely trifurcate, seg- 
ments long rather rigid not collapsing, floating I. long-stalked 
subpeltate subtripartite loith sessile obovate 3 — 5-\oheiX segments, 
ped. slender narrowing gi-adually exceeding the 1., fl. large, pet. 
cuneate-obovate 7 — 9-veined not contiguous persistent, stig. 
tongueshaped, receptacle ovate-conical, carp, ^-ovate compressed 
and narrowed upwards. — iS^. 82. 2. — St. rising out of the water. 
Floating!, semicircular, flat, nearly tripartite, outer base of lateral 
segments rounded. Stip. oblong, much ndnato. Buds globular. 
Fl. starlike. Stam. many, exceeding pistils. Style recurved. — 
Ponds and ditches, especially near the sea; often in brackish 
water. P. VI.— IX. E. 
