540 



DMBELLIFBRAE. 



[VOL. II. 



2. Hydrocotyle Canbyi C. & R. Can- 

 by's Marsh-Pennywort. (Fig. 2704.) 



Hydrocotyle umbellata var. antbigua A. Gray. Mm. 



"Ed. 5, 190. 1867. Not H. ambigna Pursh, 1814. 

 Hydrocotyle Canbyi Coult. & Rose, But. i 



103. 1887. 



Stems creeping, sometimes 12' long, the sub- 

 terranean branches tuberiferous. Petioles short, 

 or elongated; leaves peltate, orbicular or nearly 

 so, y*'-\W wide, with 7-11 shallow broad 

 mostly crenulate lobes; peduncles elongated; 

 inflorescence mostly proliferous, rarely simply 

 umbellate; verticils 3-10 flowered; pedicels i"- 

 2" long, or some of them rarely 4" long; fruit 

 about i" long and 2" broad, slightly notched 

 at both ends when mature, much flattened, the 

 intermediate ribs corky-thickened, the dorsal 

 one very obtuse. 



In moist ground. New Jersey to Florida. Ap- 

 pearing in some respects intermediate between the 

 preceding species and the next. June-Sept. 



3. Hydrocotyle verticillata Thunb. 



Whorled Marsh-Pennywort. 



(Fig. 2705.) 



Hydrocotyle rerticillata Thunb. Diss. a: 415. pi. 



'798. 

 Hydrocotyle inlerrufita Muhl. Cat 30. 1813. 



Similar to the two preceding species. In- 

 florescence always proliferous, i'-2' long; 

 verticils 2-6- flowered; pedicels very short, 

 usually less than W long; fruit about i" 

 long, i>"-2" broad, rounded or truncate at 

 each end, not notched; intermediate ribs of 

 the carpels filiform, not corky-thickened, the 

 dorsal one acute. 



In moist soil, Massachusetts to Florida, 

 mainly near the coast, west to Texas and southern 

 California, and in Central and South America. 

 June-Sept. 



4. Hydrocotyle Americana L. 



American Marsh-Pennywort. 



(Fig. 2706.) 



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 peltate, deeply cordate, i'-2' wide, with 

 9-13 shallow crenulate lobes; umbels ses- 

 sile or very nearly so at the nodes, 1-5- 

 flowered; pedicels less than i" long; fruit 

 slightly more than W broad and nearly as 

 high, the ribs all filiform. 



In wet places, Nova Scotia to Ontario and 

 Minnesota, south to southern New York, Penn- 

 sylvania, and in the mountains to North Caro- 

 lina. Ascends to 3000 ft. in Virginia. June-Sept. 



