68 PENTANDRIA— DIGYNIA. CEiianthe. 

 153. CENANTHE. Watei-dropwort. 



Linn. Gen. \4Q. Juss.22]. Fl.Br.3l7. Spreng. Prodr.37. Tourn. 

 1. 166. Lam. t. 203. Gcertn. t. 22. 



Phellandrium. Linn. Gen. \AQ. Juss. 221. Ft. Br. 321. Tourn. 

 t.\6l. 



Fl. more or less completely separated, or partially imperfect; 

 the outermost very irregular, abortive; the innermost 

 smaller, regular, and prolific. Cal. superior, of 5 large, 

 lanceolate, acute, somewhat unequal, permanent leaves. 

 Pet. 5, inversely heart-shaped, with inflexed points ; in 

 the fertile flowers. nearly equal; in those of the circum- 

 ference very unequal, but with equal lobes in each petal. 

 Filam. thread-shaped, longer than the corolla. Anth. in- 

 cumbent, small, roundish. Germe?i inferior, ovate-oblong, 

 furrowed. Sti/les awl-shaped, slender, tumid at the base ; 

 in the barren fl. short and imperfect, with a greatly dilated 

 or depressed base, in the place of the Jlorol receptacle. 

 Stigmas small, obtuse, recurved. Fruit oblong, or some- 

 what ovate, obtuse, with a corky bark, and 3 or 5 tumid, 

 unequal, rounded ribs, with narrow, deep, intermediate 

 furrows, in some species intermediate ribs ; the summit 

 crowned with the permanent calyx, and rigid, elongated, 

 somewhat spreading, styles. Seeds ovate, with a light, 

 furrowed, more or less spongy, bark. 

 Perennial, or biennial, fetid, often poisonous, aquatic herhsy 

 with roundish, furrowed, branched, leafy, often hollow 

 and tumid, sterns^ and compound, much-divided leaves. 

 Umbels various, rather clumsy ; partial ones dense, finally 

 spherical, of very numerous rays, extremely short in the 

 disk. GeJieral Bracteas linear, in some cases numerous, 

 in others entirely wanting ; partial numerous, narrow. 

 Cal. green, conspicuous in every stage of growth. Fl. 

 white, or pale purplish. 



1. CEt.Jistulosa. Common Water-dropwort. 



Root sending forth runners. Stem-leaves pinnate, cylin- 

 drical, tubular. General bracteas mostly wanting. 



CE. fistulosa. Linn.Sp.PL365. Willd. v. \. 1140. Fl.Br.3\7. 

 Engl. Bot. V. 6. <.363. Hook. Scot. 91. Fl. Dan. t. 846. 



CE. n. 755. Hall. Hist. v. 1.331. 



OS. aquatica. Bauh. Pin. 162, Raii Syn. 210. 



CE. aquatica triflora, caulibus fistulosis. Moris, v. 3. 289. sect. 9. 

 t.7.f.8. Raii Syn. 210. 



CEnanthe. Riv. Pentap. Irr. i. 66. 



