Hydrocotyle. USIBELLIFERiE. 263 



p. 140; Tmr. ^ Gr. fl. N. Am. 1. p. 599. H. umbellulata, Mich^. fl. 1. „. 161 • A 

 Richard, I. c. t. 52. /. 3. ' 



Perennial. Stem creeping and rooting in the mud, or partly floating. Leaves 1 - 2 inches 

 m diameter, with about 12 broad obtuse shallow lobes or crenatures, and as many radiating 

 vems : petioles 4-8 inches long. Umbels nearly an inch in diameter, usually simple. Frui'l 

 a little emarginate at the base and apex, broader than long, somewhat tumid : ribs sli<Thtlv 

 elevated. ° - 



Overflowed boggy places and shallow ponds. Near Albany {Dr. Beck and Mr. Tracy) ■ 

 Suff-olk county, Long Island ; Long Pond, South Salem, Westchester county (Dr. Mead). 

 July - September. 



2. CRANTZIA. Nutt. gen. 1. p. 177; Endl. gen. 4.^56. Crantzia. 



[ In memory of Prof. H. I. N. Crantz, an Austrian botanist of tlie last century, author of a work on Umbeliifera,, &c.J 



Calyx-tube somewhat globose ; the margin obsolete. Petals roundish, entire, obtuse. Fruit 

 nearly globose ; the commissure excavated, nearly orbicular, with 2 vitta;. Carpels unequal, 

 with 5 filiform ribs ; 3 of them dorsal and narrow, the others marginal, and united with the 

 thick corky margin which surrounds the fruit : intervals with single vitt«. Carpophore 

 adhering to the carpels, and indistinct. Transverse section of the seed orbicular. — Very 

 small creeping herbs, with hnear entire succulent leaves, marked with transverse lines. 

 Umbels few-flowered, simple, involucrcd. Flowers white or rose-color, pedicellate. Hardly 

 belonging to this tribe. 



.1. Crantzia line ATA, Nutt. Narrow-leaved Crantzia. 



■ Leaves cuneate-linear, obtuse, shorter than the peduncles.— iVw^. I. c. ; DC. prodr. 4. 

 p. 71 ; Torr. <^ Gr. fl. N. Am. 1. p. 600. Hydrocotyle lineata, Michx. ft. I. p 62- A 

 Richard, I. c. t. 68. /. 38 ; Ell. sk. 1. p. 347; Torr. fl.l.p. 304. Elaline foliis oppositis, 

 Oron. fl. Virg. p. 62. 



Perennial. Stem creeping and rooting in mud, throwing up leaves and peduncles at the 

 jomts. Leaves about 2 at each joint, 1 - 2 inches long and a line and a half wide, erect, 

 marked with 4-6 transverse lines ; the longitudinal veins obsolete. Umbels 8 - 10-flowered ;' 

 the pedicels 3-4 lines long. Involucre of 5 - 6 small lanceolate leaflets. Petals white,' 

 v»ith-a linge of red. Styles short and recurved. Fruit about a line in diameter : commissure' 

 oval, with a broad white corky margin. 



Muddy banks of rivers, generally where the water is brackish. West-Point (Prof. Bailev) ■ 

 near Peckskill (Dr. A/earf). 



