aiYRRHis. PENTANDRIA. DIGYNIA. 311 



smooth. M'utt. Ge?i. I. p. 192. Roem, ir SchuIt.Yl. 

 p. 516. Ch^rophyllum canadense Pers. St/n. I. p. 320. 

 Purs h Fl.hp.\95, Elliott Sk. I. 1^.352, SisoN can- 

 adense L. Willd. Spec. I. p. 696. Mich, Fl. I. p. 

 168. 



Rooi perennial, fusiform. Stem a foot and a half, or 2 feet high, 

 erect, smooth. Leaves ternate ; radical ones 2 — 3-lobed ; 

 cauline somewhat incised, broad-ovate, and often rhomboid ; 

 petioles membranaceous, amplexicaul. Umbels numerous, 

 with the rays straight, and very unequal when in fruit. Uni- 

 versal involucrum wanting; partial of 2—3 minute subulate 

 leaves. Calyx obsolete. Petals white, subcordate, with 

 an inflexed point. Styles %\\ov\., subulate, erect ; stigmas sim- 

 ple, very minute. Fruit not attenuate at the base, one-fourth 

 of an inch long, very smooth, striate, rostrate with the persist- 

 ent styles. 



Hab. In shady rocky woods. June. 



208. SlUMo L. 



Fruit somewhat prismatic, with 5 obtuse ribs; in 

 tervals subconvex. Involucra entire. Roem. b' 

 Schult. Gen. 1210. 



1. S. latifolium L. : stem angular; submersed leaves bi- 

 pinnatifid ; upper ones pinnate ; leaflets oblong-lanceolate, un- 

 equal at the base, acutely serrate ; umbels terminal. Willd, 

 Spec. I. p, U3 1 . Smith Fl. Brit. I, p. 3 1 2. Eng. Bot, t. 

 204. Roem. (^ Schult. VI. 331. MuhU Cat. p. 30. 

 Big. Bost. p. 69. S. denliculalum Elliott Sk. I. p. 354? 



Root perennial, creeping. Stern erect, 7-angled, very smooth, 

 about a foot and a half high. Leaves alternate, simply pin- 

 nate, with a terminal leaflet ; leaflets 4 pairs, remote, sessile, 

 4 — 6 inches long, and often 2 inches broad, smooth ; margin 

 acutely and rather coarsely toothed ; those immersed often 

 finely divided. Umbel many-rayed, unequal ; partial umbels 

 10 — 15-liowered. Involucra many-leaved ; leaflets lanceolate, 

 acuminate, with a prominent midrib. Calyx obsoletely 5-tooth- 

 ed. Petals white, inflexed. Styles long, refiexed ; stigmas 

 capitate. Fruit oval, Avith obtuse elevated ribs, laterally com- 

 pressed. 



Hab. In shady swamps. In New- Jersey ; near New -York. In 

 the Highlands of New-York. Barratt. Near Boston, 

 Big e low, ccc. July. 



2. S. lincare Mich. : stem angular and sulcate; leaves 

 pinnate ; leaflets 4 — 5 pairs, linear-lanceolate, acutely and 

 finely serrate ; involucra many-leaved, linear ; umbels ter- 

 minal. Mich. FL I. p. 167, Pursh FL 1. p. 194. 



