BTDROCOTYLE. PENTANDRIA. DIGYNIA. 303 



smooth and striate, or costate. Epi^ynuus disk y^Mow ; 

 glandular bifid. ^. Richard fi. in Ann. Gen. des 

 Scienc. Phys. 4. liv. p. 164. Marsh Penny-wort. 



1 . H. vulgaris L. : leaves peltate, orbicular, crenate ; 

 umbels capitate, about 5-flowered. Rich. 1. c. p. 1 07. no. 1 . 

 Willd. Spec. I. p. 1360. ,S' mith FL Brit, I. p. 290. Eng. 

 Bot. p. 751. Mich. FL I. ip. 161. P ur s h FL I. p. 190» 

 Roem. <^ Schult.W.Tp. 344. H. intcrrupta MuhL Cat. 

 p. 29. Elliott Sk. I. p. 345. 



Root perennial, creeping. Slems terete, glabrous, branching." 



Leaves alternate, strictly peltate, glabrous, slightly crenate ; 



petioles 2 — 3 inches. S/iikes axillary and opposite the leaves. 



I'loioers in spikes, sessile, forming whorls 2 — 3 lines apart. 



Calyx a mere elevated line or margin round the summit of 



the germen. Coro//c nearly white ; /zera/s lanceolate, Eli. 

 Hab In swamps and overflowed places. Canada to Georgia. 



Pur s h. 



I suspect this species has not been found so far north as in? 



dicated by Pur s h. 



2. H. umhellata L. : leaves peltate, crenate, emarginate 

 at the base ; umbel of many pedunculate flowers. Willd, 

 S/jec. 1. p. 1361. Spreng. Umb, Spec, }p. I. t. 1. Pursk 

 FL 1. p. 190. Elliott SA-. I. p. 346. Walt. Car. p. 

 112. Roem.S^Schult.W. p. 345. H. umbelulata M i c h.. 

 FL I. p. 161, Rich. 1. c. p. 169. no. 4. t. 53. f. 4. 



Root perennial, creeping. Stem rooting at the joints. Leaves, 

 subreniform-peltate, obtusely crenate. Umbel on a peduncle 

 longer than the leaves, 20 — 30-flowered ; pedicels about one 

 third of an inch long. Leaflets of the involucrum minute. 

 Corolla white ; fietals ovate. Fruit reniform. 



Hab. In Pennsylvania. August. Muhlenberg: Near AI-. 

 bany, New-York. Beck&ud Tracy. June. 



3. H. americana L. : smooth ; root tuberous ; leaves re<- 

 niform, somewhat 7-lobed, crenate ; umbels few-flowered, 

 sessile. i2ic A. 1. c. p. 185. no. 19. t. 55. f. 10. Willd. 

 Spec. I. p. 1361. Spreng. Umb. Spec. p. 3. t. 2. f. 3. 

 M ich. FL I. p. 162. Pxirsh FL I. p. 190. Big. BosL 

 p. 67. Elliott Sk.\. p. 3A8. W a I i. Car. p l\3. R o t m, 

 ii Schult. VI. p. 346. 



Root perennial. Stem procumbent, filiform, with long creeping 

 suckers. Leaves nearly orbicular, 9-nerved, divided to the pe- 

 tiole at the base, thin and membranaceous. Umbels or glom- 

 erules 4 — 6-flowercd, axillary. Calyx obsolete. Petals green- 

 ish-white, acute. Pruit orbicular. 



Hab. In wet shady plate? and in woods. June— August. 



