104 DIALYPETALOUS EXOGENS 



single prominent vittae. Smooth marsh perennials: leaves triter- 

 nately dissected; involucre mostly none; involucels many-leaved; 

 flowers white. 



1. C. maculsita, L. Stem spotted or streaked ; leaflets ovate- 

 lanceolate, acuminate, mucronately serrate, the nerves running to 

 the notches. 

 SPOTTED CICUTA. Water Hemlock. 



Stem 4 to 6 feet high, branching, striate with green and purple, or yellowish 

 brown. Leaflets 2 to 3 inches long, petiolulate ; common petioles often with a mem- 

 branaceous margin produced into 2 lobes at summit. Umbels terminal and axil- 

 lary; ribs of the carpels rather broad, the channels reddish brown, filled with 

 aromatic oily matter. 

 Hob. Margins of swampy rivulets : frequent. Fl. July. Fr. Sept. 



Obs. The mature fruit of this plant has a strong anisate odor. 

 The root is poisonous ; and the lives of children, and others, are 

 often endangered and sometimes destroyed by eating it, in mistake 

 for that of the Sweet Cicely (Osmorrhiza longistylis, DC.}. The her- 

 bage is also said to be destructive to cattle, when eaten by them: 

 all which serves to show the importance of sufficient Botanical 

 knowledge, among the people, to enable them to understand, and 

 avoid or extirpate the evil. 



160. SMJM, L. 



[Supposed to be from the Celtic, Siu, water, its usual habitat.] 

 Fruit orbicular-ovate, flattish at the sides; carpels with 5 equal 

 prominent obtuse ribs ; vittae numerous. Aquatic or marsh peren- 

 nials : leaves odd-pinnately dissected ; involucre and involucels many- 

 leaved ; flowers white. 



1. S. lilt i folium. L,. Stem sulcate-angled ; leaflets 9 to 13, 

 oblong-lanceolate, incised-serrate, sometimes pinnatifid, unequal at 

 base, sessile, the terminal one petiolulate, often 3-lobed. 

 BROAD-LEAVED SIUM. Water Parsnep. 



Stem 2 to 4 or 5 feet high., stout, angular, with broad furrows, smooth, yellowish- 

 green, much branched. Leaflets 2 to 4 inches long, varying from linear-lanceolate 

 to ovate-lanceolate, tapering to an acute point. Umbels spreading, of numerous 

 unequal rays ; fruit crowned with a conspicuous yellowish disk. 

 Hab. Swamps, and margins of streams : frequent. Fl. July. Fr. Sept. 



Obs. A nearly allied plant, with very narrow, sublinear leaflets, 

 has been found along the Schuylkill, on the northern side of the 

 County, which, probably, is the 8. linedre, of MX. but I have not 

 had an opportunity to examine it, satisfactorily. 



161. CRYPTOTAE V ]VIA, DC. 



[Gr. Kryptos, hidden, and Tainia, a fillet; the vittae being concealed.] 

 Fruit linear-elliptic; styles subulate, persistent; carpels with 5 

 equal obtuse ribs ; vittae slender, 1 in each channel, and 1 concealed 

 under each rib. A smooth perennial: leaves mostly trifoliolate, 

 thin; umbels unequally rayed, subpaniculate ; involucre none; in- 

 volucels few-leaved ; flowers white. 



1. C. CanadensiS, DC. Leaflets rhombic-ovate to lanceolate, 

 doubly and sharply incised-serrate, subsessile. 



