6 1. EANtTNCULACE^. 



1. -H. trichophyVlus (Ctaix) ; 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, ^«t ohovate 5 — 

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

 globular, carp, f-obovate laterally apiculate compressed. — JS. 

 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 

 M. Oodronii, Gren. ! and also R. radians Eev. !) Stip._^-adnate, 

 large, round, auricled. Fr.-ped. short, thick, arching, most 

 curved near their base. Buds globose. Fl. starlike. Stam. 

 exceeding the pistils. Stig. short but lengthening. Receptacle 

 as thick as peduncle. Oarp. a little narrowed at the end!! — B. 

 confervoides from Rescobie appears to be a small wholly sub- 

 mersed form of this species. J. of B. xviii. 344. — How is B. 

 aspergillifolius (Dum.) to be separated from this ? — Ponds and 

 ditches. ' P. V. VI. Water Fennel. E. I. 



2. B. Drouet'ii (F. Sohultz) ; submersed I. (light green) rather 

 loosely trifurcate, tassel-hke 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, i-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. iSiam. exceeding 

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

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

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



3. B. heterophil' lus (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, ^et broadly 

 cuneate-obovate 7—9-ijeined not contiguous persistent, stig. ob- 

 long, receptacle conical, carp, ^obovate laterally pointed. — B. 

 aquatilis Sm. B. 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. Bzids slightlg c?e- 

 /)?-esserf and rather pentagonal. Fl. becoming starlike. Stam. 

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

 edge straight. — /3. submersus, floating 1. 0, submersed 1. more 

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

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



