PENTANDR1 v, DIGYN1 \ 145 



nail sheaths, only about 4 or 5 OB (lie whole 

 stem : leaflets 5 or 6 inches long, ami about 9 

 fines wide, tbickish, perfect!} rutin', or now 

 and then, but rarely, bifid, circumscribed by a 

 white ami somewhat scabrous margin. Imbel 

 rather small, with elongated rays. Dmbellets 

 roandish, with sessile abortive Bowers, involu- 

 cell many-leaved, filiform-subulate. Calixdis- 

 tinrt, 5-toothed. Petals cordately-inflected. 

 Stales very short, peltately dilated at the base. 

 Fruit smooth) Hat, and Bubelliptic. — Nutk 

 (Enanthe ambigua» Nutt Gen. Am. pi. vol. l. p. 



Sium tenuifolium, Pursb. 



This plant has been found by Mr. Collins, in the marshes of 

 1 . attaining the height n I t. On the marshy hanks 



oft! ir Philadelphia; Mr. Nuttall. According to 



a specimen in the Muhlenbergian herbarium, this is the sium 

 tenuifolium of Pursh. 



140. CICUTA. Gen. pi. 486. (UmbeQifer*.) 



Fruit corticate, roundish? and laterally com- 

 pressed; oommissure oblong-elliptic, flat. 

 Seed gibbously convex, scored with 5 con- 

 verging obtuse ridges, and 4 intermediate 



tabercalate grooves. — A'utt. 



1. ( . - rraturefi of the leaves mucronatc; petioles macuitta. 

 membranaceous, 2 lobed at the summit. — Pcrs* 



lis plant varies occasionally with broad-ovate or ovale 

 About three or four feet high, and possessed of a re- 

 markable sweetish aromatic warm taste and smell. In damp 

 places, as the borders of ditches, rivulets, creeks and rivers, 



common. Perennial ; July, August. 



C. k'H\e^ various; in bulbiferous stems biter- b«ftiftm 

 aate and very thin, in bulbiferous and umbel- 

 liferous stems simply termite leaflets thicker, 

 ■pon ihorter pedum lesj linear sublaaceolatej 



