Hydrocotyle. UMBELLIFER^. 203 



p. 140; To7-r. ^ Gr.fi. N. Am. 1. p. 599. H. umbellulata, Michx. fl. 1. p. 161 ; A. 

 Richard, I. c. t. 52. /. 3. 



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

 in diameter, with about 12 broad obtuse shallow lobes or crenalures, and as many radiating 

 veins : petioles 4-8 inches long. Umbels nearly an inch in diameter, usually simple. Fruit 

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

 elevated. 



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

 Suffolk county, Long Island ; Long Pond, South Salem, Westchester county {Dr. Mead). 

 July — September. 



2. CRANTZIA. Nutt. gen. 1. p. 177; EwJ/. gen. 4356. CRANTZIA. 



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



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

 nearly globose ; the commissure excavated, nearly orbicular, with 2 vitlM. 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 willi single vitta;. Carpophore 

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

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

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

 belonging to this tribe. 



1. Crantzia lineata, Nutt. Narrow-leaved Crantzia. 



Leaves cuneate-linear, obtuse, shorter than the peduncles. — Nutt. I.e.; DC. prodr. i. 

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

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

 Gron. fl. Virg. p. 62. 



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

 joints. 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, 

 with a tinge 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. Bailey) ; 

 near Peekskill {Dr. Mead). 



