PENTANDRIA, DIGYNIA. 
143 
small sheaths, only about 4 or 5 on the whole 
stem ; leaflets 5 or 6 inches long, and about 2 
lines wide, thickish, perfectly entire, or now 
and then, but rarely, bifid, circumscribed by a 
white and somewhat scabrous margin. Umbel 
rather small, with elongated rays. Umbellets 
roundish, with sessile abortive flowers, involu- 
cell many-leaved, filiform-subulate. Calix dis- 
tinct, 5-toothed. Petals cordately-inflected. 
Styles very short, pel lately dilated at the base. 
Fruit smooth, flat, and subelliptic. — 
QEnanthe ambigua, Nutt. Gen. Am. pL vol. 1. p. 
189. 
Siam teniiifolium, Piirsh. 
This plant has been found by Mr. Collins, in the marshes of 
Jersey, attaining* the height of 8 feet. On the marshy banks 
of the Delaware, near Philadelphia ; Mr. Nuttall. According to 
a specimen in the Muhlenbergian herbarium., this is the sium 
tenuifolium of Pursh. 
140. CICUTA. Gen. pi. 486. {UmbelUferce.) 
Fruit corticate, roundish, and laterally com- 
pressed; commissure oblong-elliptic, flat. 
Seed gibbously convex, scored with 5 con- 
verging obtuse ridges, and 4 intermediate 
tuberculate grooves. — J\Tutt. 
1. C. serratures of the leaves mucronate; petioles macuiata. 
membranaceous, 2 lobed at the summit. — Pers. 
This plant varies occasionally with broad-ovate or ovale 
folioles. 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, 
very common. Perennial.? July, August. 
2 . C. leaves various; in bulbiferous stems biter- ^^uiwfeia. 
nate and very thin, in bulbiferous and umbel- 
liferous stems simply ternate, leaflets thicker, 
upon shorter peduncles, linear sublanceolate, 
