650 



AMMIACEAE. 



VOL. II. 



4. Hydrocotyle americana L. Amer- 

 ican Marsh-Pennywort Penny-Post. 

 Fig- 3 T 57- 



Hydrocotyle americana L. Sp. PI. 234. 1753. 



Stems filiform, creeping, often bearing small 

 tubers; petioles rather short, seldom over 2' 

 long; leaves membranous, reniform, not pel- 

 tate, deeply cordate, i'-2" wide, with 9-13 shal- 

 low crenulate lobes ; umbels sessile or very 

 nearly so at the nodes, i-5-flowered ; pedicels 

 less than i" long; fruit slightly more than i" 

 broad and nearly as high, the ribs all filiform. 



In wet places, Nova Scotia to Ontario and Min- 

 nesota, south to southern New York, Pennsylva- 

 nia, and in the mountains to North Carolina. As- 

 cends to 3000 ft. in Virginiai June-Sept. 



5. Hydrocotyle ranunculoides L. f . Floating 

 Marsh-Pennywort. Fig. 3 1 58. 



Hydrocotyle ranunculoides L. f. Suppl. 177. 1781. 

 Hydrocotyle natans T. & G. Fl. N. A. i : 599. 1840. 



Stem usually floating, sometimes creeping on 

 shores, rather stout, abundantly rooting from the 

 nodes, branched, 6'-24' long. Petioles elongated, 

 weak; leaves reniform, i'-2' wide, not peltate, 3-7- 

 cleft, deeply cordate at the base, the lobes crenate; 

 peduncles i'-3' long, much shorter than the petioles, 

 recurved in mature fruit; umbels simple, 5-io-flow- 

 ered; fruit nearly orbicular, about ii" broad, the 

 ribs obscure and filiform. 



In ponds and swamps, eastern Pennsylvania to Florida, 

 near the coast, west to Texas, Arkansas, and on the 

 Pacific Coast from Oregon to Lower California. Also 

 in Cuba, Central and South America, Abyssinia and 

 Italy. June-Sept. 



6. Hydrocotyle rotundifolia Roxb. Asiatic 

 Pennywort. Fig. 3159. 



H. rotundifolia Roxb. Hort. Beng. 21. 1814. 



Tufted and creeping, the stems very slender. 

 Leaves reniform-orbicular with a narrow or 

 broad sinus, glabrous on both sides or hispidu- 

 lous beneath, 5"-io" broad, their petioles slender 

 or filiform ; peduncles as long as the petioles, or 

 shorter ; capitate umbels several-flowered ; fruit 

 slightly notched at the base and apex; its ribs 

 filiform. 



Escaped into lawns from cultivation in greenhouses, 

 Pennsylvania, Kentucky and District of Columbia, 

 Native of tropical Asia. Summer. 



