306 PENTANDRIA. DTGYNIA. sison. 



almost filiform, slightly angular. Universal involucrum want- 

 ing; partial ones S-tootlied. Calyx with 5 minute acute teeth. 

 Petals yellow, acuminate, with the apex inflexed. Styles re- 

 curved, longer than the germen. Fruit suborbicular, blackish ; 

 Tibs not winged. 

 Hab. , In meadows and on mountains. June. 



3. S. capillaceus Spreng.: leaves decompound, filiform, 

 stem dichotomous, angular; involucrum subpinnalifid. Roem, 

 4-' S chit 1 1, VL p. 411. Ammi capitlaceum Mich, Fl. I. 

 p. 164. Pursh FL I. p. 192. ^utt. Gen. I. p. 179. 

 Elliott Sfc, i. p. 349. A. majus Walt. Car. p. 113. 



Root annual. Stem much branched, deeply sulcate, erect or 

 decumbent, about one foot long. Leaves decompound, with 

 setaceous dichotomous segments, very smooth ; petiole short. 

 Umbels axillary, pedunculate, with spreading rays. Universal 

 involucrum about 3-leaved, S— 5-cleft, setaceous; partial ones 

 of 2 — 3 filiform leaves. Calyx minute, 5-toothed. Petals 

 white, ovate, with acute inflexed points. Stamens as long^ as 

 the corolla ; anthers purple. Styles minute, recurved. Fruit 

 ovate, convex ; ribs rather acute ; intervals convex. 



Hab. Ill brackish bog-meadows. Plentiful near New- York, 

 and on the sea-coasi of Long-Island and New-Jersey. Fair- 

 fiekl, New-York. Ha die y. In the vicinity of Philadelphia. 

 Delaware. Mu hlenb er g. July — October. 



As I have^jllowed Sp. r e n g e I entirely in the distribution 

 of the Umbellifer^, the Ammi ca/iillaceum is referred, on 

 "his authority, to the genus Sison; but there is not the least 

 resemblance in habit between this plant and the preceding spe- 

 cies. S/irenge I also cites, as a synonym of this plant, his 

 own, as well as J^u 1 1 all* s jEthusa lefitofihylla. The lat- 

 ter, however, Mr. JSTu t tall remarks, is entirely destitute of 

 both universal and partial involucra. 



203. CNIDIUM. Cuss on. 



Involiicntm l-leaved or 0. Fruit ovate, solid; rids 

 o, acute, somewhat winged ; intervals sulcate, striate. 

 Boem. £s? Sclitilt. Gen. 1179. 



1. C. canadmse Spreng.: stem angular, flexuons ; 

 leaves bipinnate, shining; leaflets many-parted; segments 

 lanceolate. Roem. k S chult. VI. p. 415. Selinum ca- 

 7iadense Mich. FL I. p. 165. Pursh FL I. 192. B i g. 

 Bost: p. 69. Elliott Sk. I. p. 351. Apium bipinnatum 

 Walt. Car. I. p. M5. 



Hab. Near the mouths of large rivers, from Canada to Carolina. 



