6 1. EAinjNCrLACEJS. 



nectary not covered with a scale. Batbachhtm Fries. Water 

 Crowfoot. 



* Sutmeraed leaves twice or thrice 3-furcate with filiform seg- 

 ments spreading in the segment of a sphere, rarely wanting. 

 JEleceptacle hispid. — (The submersed leaves become stiff 

 when old. The younger ones should be examined.) 



1. M. 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 

 about equalling the 1., fl. small, pet. obovate 5 — 7-veined not 

 contiguous evanescent, stig. oblong, receptacle globular, carp. 

 j-obovate laterally apiculate compressed. — E. B. 8. 2968. — St. 

 67. 11. — St. not rising out of the water. Upper 1. sessile, all 

 dense. Floating 1. very rare (when it is JJ. Godronii Gren. !). 

 Stip. 5-adnate, large, round, aliricled. 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. I. 



3. R. Dfouet'ii (F. Schultz) ; submersed I. (light green) rather 

 closely trifm-cate, tassel-like segments flaccid, floating 1, (rare) 

 tripartite with subseasile or stalked wedgeshaped bifld 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. — 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 diiferent 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 sub- 

 central. — Ponds and ditches. P. V. VI. E. 



8. JR. heterophyVhis (Fries) ; submersed I. loosely trifurcate, 

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

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

 ing but narrowed scarcely exceeding the 1., fl. large, ^ei. broadly 

 cuneate-obovate 7 — 9-veined not conHgnons persistent, stig. ob- 

 long, receptacle conical, carp, g-obovate laterally pointed. — S. 

 aquaiilis Sm. — St. not rising out of the water. Fr.-ped. slen- 

 der, ouvved near their base, nearly straight above. Floating 

 1. nearly circular, sometimes 0. Stip. much adnate. Buds 

 slightly depressed and rather pentagonal. Fl. becoming star- 



