68 PENTANDRIA— DIGYNIA. CEnanthe. 



153. CENANTHE. Water-dropwort. 



Linn. Gen. 140. Juss. 22\. Fl.Br.3l7. Spreng.Prodr.37. Tmrn. 



t. 166. Lam. t. 203. Gartr). t. 22. 

 Phellandrium. Linn.Gen.lAO. Juss.22\. Fl. Br. 321. Tourn. 



t.\6\. 



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. Gcrmen inferior, ovate-oblong, 

 furrowed. Styles 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 floral receptacle. Stig- 

 mas small, obtuse, recurved. Fruit oblong, or somewhat 

 ovate, obtuse, with a corky bark, and 3 or 5 timiid, un- 

 equal, rounded ribs, with narrow, deep, intermediate fur- 

 rows, 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 Jicrhs, 

 with roundish, furrowed, branched, leafy, often hollow 

 and tumid, stems, and compound, much-divided leaves. 

 Umbels various, rather clumsy ; partial ones dense, finally 

 spherical, of very numerous rays, extremely short in the 

 disk. General 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. CE.Jistnlosa. Common Water- dropwort. 



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

 drical, tubular. General bracteas mostly wanting. 



CE. fistulosa. Linn. Sp. PI. 365. mild. r. 1 . 1 1 40. Fl. Br. 317. 



Engl. Bot. j;. 6. t. 363. Hook. Scot. 9\. Fl. Dan. t. 846. 

 OE. n, 755. Hall. Hist. v.\.23]. 

 CE. aquatica. Bauli.Pin. 162. Raii Syn. 210. 

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



t.7.f.8. Raii Syn. 2\0. 



