Purshetl ™PhyllWS' emersed leaves 3-Parted. DC. I c .-R . aquatilis,
0. capillaceus: leaves petioled, all immersed and filiformly dissected.
D C l. c.j Hook l. c.—R. pantothrix, DC. syst. 1. p. 235; Ell. sk. 2. p. 57.
R. fhmatihs, Willd. sp. 2. p. 1333 ; Pursh, l.c. 1
y. caspitosus: leaves petioled, all emersed, with a nearly orbicular cir-
cumscription, miformly dissected, the segments rigidly divergent: base of the
petiole broad^ sheathing and auricled. DC. 1. c.; Hook. 1. c.
is. stagnails: leaves sessile, all immersed, filiformly dissected, circinnate;
segments short; sheaths obscurely auricled; carpels rather acute, nearly
smooth. DC. 1. c. ; Hook. 1. c. . y
R Pr d™“ d / i-V'er,4 S * *’ Af £ e Arl)®rica to South Carolina, rind west to the
Rocky Mountains! and Columbia River! California, (Hook & Am. in
bot Beechey’s voy.) June-Aug.-Stem long, slender,'jointed Leaves
dichotomously or trichotomously divided. Flowers smaller than those of R.
acns. Oatyx glabrous.—We have never seen American specimens of Var. a.
V ar. y and British America, Hooker;
§ 2. Carpels smooth (not wrinkled), ovate or subrotund, in rbundish
heads: root fibrous.—Hecatonia, DC.
* Leaves divided: flowers white.
, % P-flidcialis (Linn.): radical leaves petioled, palmately 3-parted or 3-
cleft; lobes rather obtuse and thick; stem about i-flowered; calyx verv hirsute;
carpels compressed, margined; DC.Greenland. rpr bdr. 1. rp-. 30■ ' 3
** Leaves all undivided: flowers yellow.
3. R . Flammula (Linn.): leaves smooth, linear-lanceolate or ovate-lance-2
olate, often denticulate; stem declined, more or less rooting at the lower
joints; peduncles opposite the leaves; carpels smooth, with a distinct subulate
beak; petals much longer thah the calyx.—DC. prodr. I. o 32 • Pursh
fl- 2. p. 391; Darlingt.! ft. Cesi. p. 327. ! ’
ß. laxicaulis: stem weak, much branched; leaves all entire; lowest
ones emptical-oblong, upper ones linear; petals oblong, attenuate at the base
three times as long as the calyx. s
. “ atedPla£ es> ditches, &c. Canada! to Worth Carolina, ß. Milledse-
ville, Georgia, Dr. Boykin ! July.—Whole plant glabrous. Stem 1-2 feet
long, a little branched; leaves 3-6 inches long, 4-8 lines broad, those of the
stem acute at each end; lower ones petioled, more or less obtuse at the base.
Peduncles 1-2 inches long. Flowers 4-5 lines in diameter. Head of carpels
globose. Beak two-thirds the length of the carpel.
4. R reptans (Linn.): leaves linear or lanceolate-linear, acute at each
end, glabrous, entire; stem creeping (rooting at the joints); carpels glabrous
puncticulate, with a minute blunt point.—DC. prodr. i. p. 32.
ß- ovalis, (Bigel.): leaves oval and lanceolate; petals 5-10. Bigel l e
y. mtermedius (Hook. !) stem creeping, slender, leaves narrow, lanceolate
the upper ones linear; flower middle sized.
5. filiformis (DC ): stem filiform, creeping extensively, leaves linear;
flowers small.—R filiformis, Michx. 1 fl. 1. p. 320; Pursh, ft. 1. p. 392
Bigel.Jl. Bost. ed. 2. p. 224. 5 J 1
Banks of rivers and low grounds, Labrador and Canada to New-York1 west
to Oregon! June-August.
Sir W. Hooker refers R. reptans to R. Flammula, and should w e have adopted
his views were it not for the difference in the carpels of the two species.
The most common variety throws out numerous filiform stems, producing
leaves and roots at the joints. Leaves mostly very narrow ; but in ft. and y.
inclining to lanceolate or even ovate. Flowers in ft. about a third of an inch
in diameter, in the other varieties smaller. Petals obovate. Carpels roundish-
ovate, the beak very short and oblique.
5. R. pusillus (Poir.) : leaves all on long petioles ; lower ones ovate, sub-
cordate, entire or sparingly toothed; upper ones linear-lanceolate; stem erect
or decumbent; petals mostly 3 (sometimes 1- 5), as long as the calyx ; carpels
ovate, with a minute blunt point.—Poir. diet. 6. p. 99 ; Pursh, jl. 2. p.
312; E ll.s k . 2. p. 5 8 ; DC. prodr. 1. p. 3 2 ; Deless. ic. 1. t. 28. R.
Flammula, Michx.! Jl. 1. p. 321; Walt. Car.p. 159.
ft. denticulatus: leaves acutely and remotely repand-denticulate, lowest
ones ovate-lanceolate; those of the stem lanceolate-linear ; flowers minute ;
carpels roundish-ovate.
y. muticus : resembling a. but the carpels very smooth and without any
beak; flowers very small.
<5. oblongifolius : leaves petiolate, denticulate, lower, ones oblong-oval, upper
ones linear-lanceolate ; petals a little longer than the calyx ; carpels
globose, not pointed, smooth.—R. oblongifolius, Ell. sk. 2. p. 58.
Boggy places. Var. o. North Carolina! to Georgia, ft. Texas, Drummond!
y. New York! to Pennsylvania. J. near Savannah, Georgia!
Elliott !—The varieties y. and <5. may prove to be distinct species.—This
species would be referred to Casalea, St. HU.
. 6. R. Cymbalaria (Pursh): stoloniferous ; leaves cordate-ovate or renlform,
petioled, obtuse, coarsely crenate ; scape 1-3-flowered; petals spatulate,
rather longer than the calyx.—Pursh ! fl. 2. p. 392 ; Hook. fl. Bor .-Am. 1.
p. 11. R. Cymbalaria ft. Americana, DC. prodr. 1. p .133.
ft. alpinus : very small; leaves 3-toothed at the apex; scape 1-flowered.—
R. halophylluSj Sc/iiecTit. animad. hot. ? (flde Hook.)
Arctic Sea, lat. 68°, to the coast of New-Jersey ! Salina, New-York!
Salt plains of the Platte, Dr. James ! Banks of the Oregon and neighbouring
streams, as well as on the contiguous coast of the Pacific, N u tta ll!
ft. Summits of the Rocky Mountains, Drummond., &c. August—Scapes 2 -
6 inches high, with one or two minute linear leaves. Stolons extensively
creeping. Leaves glabrous, somewhat fleshy, roundish-ovate or oblong. Sepals
oval, concave. Petals 5-8. Carpels ovate, acute, compressed, with several
elevated ribs, disposed in dense oblong heads.—Very near R. salsuginosus,
Pall. The Siberian plant is commonly smaller than the North American
variety, but in other respects there is no essential difference.
*** Leaves more or less divided: flowers yellow. .
7. R. P allassii (Schlecht.): stem creeping, fistulous; leaves oval Or obovate,
cuneiform, 3-parted ; sepals 3; petals 8 ; head of carpels spherical; carpels
thick, ovate, glabrous, beaked. Schlecht. animad. bot. 1. p. 15. t. 2 ; Hook.
fl. Bor.-Aril. 1. p. 10.
On the western shore of extreme Arctic America, beyond Behring’s Straits,
Chamisso.—Allied to Ficaria.
8. R. aur’icomus (Linn.) : leaves glabrous, radical ones petioled, cordate,
mostly 3-parted or lobed; cauline ones divided into linear entire or slightly
toothed lobes; calyx pubescent, shorter than the petals. DC. prodr. 1. p. 33,
Greenland.—Pursh records this species • as a native of Pennsylvania, but
no other botanist has found it in any part of the United States.
3