540 UMBELLIFERAE. [Vor. II. 
2. Hydrocotyle CanbyiC. & R. Can- 
by’s Marsh-Pennywort. (Fig. 2704.) 
Hydrocotyle umbellata var. ambigua A. Gray, Man. 
Ed. 5, 190. 1867. Not H. ambigua Pursh, 1814. 
Hydrocotyle Canbyi Coult. & Rose, Bot. Gaz. 12: 
103. 1887. 
Stems creeping, sometimes 12’ long, the sub- 
terranean branches tuberiferous. Petioles short, 
or elongated; leaves peltate, orbicular or nearly 
so, '4’-134’ wide, with 7-11 shallow broad 
mostly crenulate lobes; peduncles elongated; 
inflorescence mostly proliferous, rarely simply 
umbellate; verticils 3-10-flowered; pedicels 1//— 
2’ long, or some of them rarely 4’ long; fruit 
about 1/’ 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 verticillata Thunb. Diss. 2: 415. pi. 
3. 1708. 
Hydrocotyle interrupta Muhl. Cat. 30. 1813. 
Similar to the two preceding species. In- 
florescence always proliferous, 1/-2’ long; 
verticils 2-6-flowered; pedicels very short, 
usually less than 34’” long; fruit about 1/7 
long, 1%/’/-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 I,. Sp. Pl. 234. 1753. 
Stems filiform, creeping, often bearing 
small tubers; petioles rather short, seldom 
over 2’ long; leaves membranous, reniform, 
not peltate, deeply cordate, 1/-2’ wide, with 
9-13 shallow crenulate lobes; umbels ses- 
sile or very nearly so at the nodes, I-5- 
flowered; pedicels less than 1/’ long; fruit 
slightly more than '%4’’ broad and nearly as 
high, the ribs all filiform. 
In wet places, Nova Scotia to Ontario and 
Minnesota, south tosouthern New York, Penn- 
sylvania, and in the mountains to North Caro- 
lina. Ascends to 3000 ft. in Virginia. June-Sept. 
—_— a 
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