UMBELLIFER^E. 141 



distinctly lobed, and in having the umbel pedunculate. Spren- 

 gel considers this species identical with H. nitidula Mich. 



2. CRANTZIA. Nutt. 



Calyx with the tube subglobose ; limb nearly wanting. Pe- 

 tals roundish, entire, obtuse. Styles obtuse. Fruit round- 

 ish ; commissure excavated. Carpels (Mericarpia D. C.) 

 unequal, with 3 marginated dorsal ribs, and 4 obtuse-angled 

 grooves. Umbel simple. Involucre [5 6-leaved. Flowers 

 white. Pentandria. Digynia. 



C. Uneata Nutt. Hydrocotyle lineata Mdi. Torr. 

 HAB. Muddy banks of streams. N. Y. to Geor. July. If. 

 Stem smooth, creeping. Leaves about 2 at each joint, 11-2 inch 

 long, thick, sessile, linear, cuneate, with transverse lines. Um- 

 bels 810 flowered, on long peduncles. Flowers pedicellate, 

 white. 



3. ERIGENIA. Nutt. 



Calyx with the margin obsolete. Petals 5, obovate, entire, 

 equal. Styles persistent, very long, subulate. Fruit ovalt 

 somewhat laterally compressed. Carpels gibbously convex, 

 marked with 3 striaB. Umbel irregular, imperfect. General 

 involucre none ; partial one a few unequal leafets. Petals 

 white. Pentandria. Digynia* 



E. buibosa Nutt. Hydrocotyle composite Pursh.-^H., Upmnata N.uhl 

 Bison bulbosum Mich. 



HAB. Wet grounds. Lancaster^ Penn. and W, to. Miss. March, 

 April. 2|. Root globose, tuberous. Stem simple, 4 5 inches 

 high, 2-leaved. Leaves 3-parted ; partitions subpinnate ; seg- 

 ments rhomboidal, cleft, Umbels terminal, 3 5 flowered. Flow- 

 ers white. The habit of this plant is so decidedly different from 

 Hydrocotyle as to, warrant its separation. 



4, SANICULA, unr^ 



Calyx with the tube echinate and the lobes persistent. Pc 

 tals erect connivent, obovate, deeply emarginate. Fruit sub- 

 globose, solid, not ribbed, armed with uncinate bristles. Urn-, 

 bets few-rayed. Leafets of the involucre few, often divided^ 

 Flowers polygamous. Pentandria. Digynia. 



S. marilandica Linn. , leaves digitate ; leafets oblong, incisely ser-i 

 rate ; flowers in small head- form umbels ; fertile ones sessile, sterile 

 ones pedicellate. 



It. canadensis Torr. .* leaves subternate ; leafets ovate, coarsely 

 toothed. $. canadensis Linn. 



