302 PENTANDRIA. DIGYNIA. eryngium. 



ed ; leaflets with a few subulate teeth. Heads small. Teeth 

 of the ca/j'jr ovate, acute. Petals pale blue, inflexed. 

 :yAB. In New-Jersey. Muhlenb erg. 



I have seen no northern specimens of this species. 



200. SANICULA. L. 



Umbels nearly simple, capitate. Involucrum few- 

 leaved. Flowers polygamous. Calyx 5-parted, per- 

 sistent. Fruit oblong, solid, not ribbed, armed with 

 uncinate bristles. lioem.^Schult. Gen. 1160. 

 NutU Gen. I. p. 178, Lam. Ill t. 191. Perfect 

 flowers sessile. Sanicle, 



S. marilandica L. : leaves all digitate ; leaflets oblong, 

 incise]}' serrate ; staininiferous flowers numerous, pedicellate. 

 W il I d. Spec. I. p. \SG7, M ic h. FL I. ^. l62. Pursh 

 F/. I. p. 191. jB ?>. Bos<. p. 67. Elliott Sk. I. i^.SAZ. 

 Walt, Car. p. U3. Roem. ^ Schult. VI. p. 340o 

 Co/d. Noveb. 53. 



Root perennial, fibrous. Stetn erect, 2 feet high, branched above, 

 smooth Leaves 3-parted to the base} segments 2 — 3-parted; 

 lobes obiong-lanceolate; serratures cuspidate. Flowers in 

 small capitulate umbels; perfect ones 3 — 5, sessile ; stamini- 

 ferous (jnes more numerous, on distinct pedicels. Involucrum 

 many-parted. Corolla white; petals obcordate, inflexed. 

 Fruit armed with hooked bristles. 



Hab. In woods and thickets ; common. June — August. 



Black Snake-root. 



j9. canadensis* : leaves subternate ; leaflets ovate, coarse- 

 ly toothed. S. canadensis L. Willd. Spec. I. p. 1366^ 

 PursA F/. I. p. 191. Muh I. Cat. ^.30. Roem,^ 

 Schult. VI. p. 339. 



Hab. Litclifield, Connecticut. Brace, Sec. 



I think there can be little doubt that the S. canadensis is 

 only a variety of S. marilandica. It differs merely in its 

 broader and less divided leaflets. The abortive flowers are pe-. 

 dicellate in both. 



201. IIYDROCOTYLE. L. 



Umbel simple. Fruit with the back and commissure 

 narrow, laterally compressed, siibrotund, 3-ribbed, ge- 

 nerally with reticulate veins. lioem. y Schult, 

 Gen. 1164. Hydrocotyle, Crantzia, and Eri- 

 GENiA, Nutt. Petals oval, acute, eqtial. Fruit 

 not tootlied at the summit, subglobose or lenticular, 



