970 AMMIACEAE 
RON obsolete. Petals white. Fruit elon- 
e: ds with 5 low ribs, and an oil- 
E ben eaeh rib and in each inter- 
e species. 
1. D. canadensis (L.) nap ae gla- 
or nearly so: stem 3- dm. tall, 
finally widely branehed: leaf- blades i 3- folio- / 
late: leaflets ovate, oval, or elliptic, 4—10 e 
long, acute or abruptly pointed, doubl y Ser- 
rate ee sharp teeth, the 1 ateral ones often 
lobed: umbels pe eduncled: rays few, slender, 
une ur in length: pedicels 2-25 mm. long: 
vidus white, 2— broad: fruit oblong 
lon g, straight, or curved at full É 
4—6 mm. 
maturity (Ho capa ORT. Erud and rich woods, various provinces, Ga. to 
—Spr.-sum. 
, S. D., and N 
10. HYDROCOTYLE [Tourn.] L. Perennial amphibious herbs. Lea 
solitary at each node. Umbels simple or proliferous. Sepals manifest. Petals 
valvate, white. Carpels with distinet ribs, and oil-bearing tissues beneath the 
epidermis.—About 75 species, widely distributed.—Sum. or all year S.—Marsu- 
PENNYWORTS. WATER-PENNYWORTS.  NAVELWORTS.—Some species are used 
medicinally. 
Leaf-blades suborbicular to transversely elliptic, peltate. 
Fruit notched at the base and the apex at maturity: intermediate ribs corky. 
mbels not proliferous, at least ee normally so. 1. H. umbellata. 
Umbels or most of them prolifer 
Peduncle produced ns 2 the first umbel as a single 
rachis, bearing o r more umbels beyond it. 2. H. Canbyi. 
Peduncle produced heed the noe as oe 
and ae aring several more or less prolifer 
mb 3. H. bonariensis. 
Fruit rounded m the base and the apex or cuneate at the 
EU e: intermediate ribs not corky, very slender. 
uit rounded or nae at the base, not cuneate. 4. H. verticillata. 
Fru uit cuneate at the bas 5. H. australis. 
Leaf-blades reniform to : r Cub not peltate 
Umbel long- -peduncled : leaf-blades deeply lo bed. 6. H. ranunculoides. 
Umbel nearly sessile: leaf-blades shallowly lobed. T. H. americana. 
1. H.u Hata L. Leaf- Pas eee 2—5 em. wide, crenate or crenate- 
lobed: tie slender, 4-12 long: fruit oe 3 mm. wide, with corky- 
thickened ribs.—Swam mps, mea aus ditches 
and low pinelands, various provinces, Fla. 
to Tex., Minn., and Mass.—(JV. I., Mer., 
C. A., S 350. dd 
2. H. Canbyi Coult. & Rose. Leaf-blades 
1.5-4 em. wide, a dis) lobed: 
PNG im 4 mm. long: fruit between 3 and 
—Dam mp places, 2e sandy 
"a ‘Coastal Plain, Fla. to Miss. and N. J. 
H. bonariensis Lam. Leaf-blades de- 
eng orbicular to  orbicular-reniform, 
-9.5 em. Sr pA lobed the lobes 
: vide.—Was 
Do ord: and a. po Plain, 
Fla. to Tex., Tenn, and N. ‘CM. rm Mer., C. A., 8. A.)—Often grows very 
A e forms ROS ANE masses, 
ena AaS ee A Neen WEEKEND ee ee ghee ye r et ye S a 
