tate, when old inflated longer than the style; leaves triternate; leaflets
suborbtcular, crenately lobed, glabrous, glaucous beneath.—Hook, fl Bor -
Anh ; 1. sy st.! p. 171; Deless. ic. 1. t. 6. J
Sandhills of Portage La Loche lat. 50°, Dr. Richardson ; Canada?
f f T‘ S‘ m h pb' mr - J>an®0 Plant. 1- l i foothigh. Leaflets as large
T. dioicum. Panicle few-flowered, loose; pedicels long. Flowers
Ovaries t w ' °« S a s sepals. Filaments conspicuously dilated.
(-e °ofc-) (o-6, DO.) ovate gibbous; the persistent style i the
length of the ovary. Rook. This plant was described by De Candolle from
specimens m the herbarium of Michaux. The locality is not recorded neither
is the plant described in Michaux’s Flora. Hooker asks whether it
S d v dflateTfil °f • i °1CAV bUt that Species scarcely dilated filaments, and linear mucronate anhthaes rrse.markably slender and
<?>? carpels semi-obovate, compressed, striate,
each on a slender stipe, nearly its own length, acute ; style none • leaves
lL3mville; PSNortht 6CAa lreoflin6atS, rM°urn. dC* hu’r otibst!u-sPellya n3-t5 -2^ feeedt ogrl amucoorue s ibne nheeaigthh.t
very smooth Leaves thin, on petioles an inch long, exstipellate. Panicle
corymbose, loose and capillary. Flowers not seen. Carpels 4- 6, widely
spreadmg membranaceous, marked with several prominent branching veins,
t'PPed with a minute stigma, but not rostrate'; the base tapering
mto along almost capillary stipe. Seed much smaller than the cavity.—This
species, the flowers of which we have not seen, is nearly related to T. clavalong
slenderest!* “ ^ yemed Carpels’ the entire absence of the style, and the
** Carpels orate or oblong, ribbed, sessile or slightly stipitate.- sepals 'caducous.
3. T. dioicum (Linn.): very glabrous, dioecious or polygamous; filaments
fihform; anthers linear, elongated, mucronate; leaves on short petioles ter-
nately decompound; leaflets rounded, crenately and obtusely lobed, glaucous
beneath; peduncles as long as the leaves; carpels oblong, sessile, strono-lv
nbbed, twice the length of the slender curved style.—DC. prodr 1 ®
P u r.K ! M r388;. Hook i f . Bor.-Am. k T. t a R f c f e ? /
DC. h e T. purpurascens! (excl. syn.), rugosum, & Carolinianum,
P 1 stipitatum: carpels conspicuously stipitate
Rocky woods, Mackenzie’s River, lat. 67°, to the mountains of S. Carohna r
and west to Oregon ! 0 Table Mountain, N. Carohna, Mr. Curtis ! Aprfl-
May.— Stem 1-2 feet high. Common petioles an inch or more in length
Leaffeteabout three-fourths of an inch in diameter, commonly somewhat 3-
lobed; the lobes crenate-toothed. Panicles loose, ,15-20-flowered. Sepals 4-
5, oval, obtuse, often purple. Filaments much longer than the sepals, almost
capillary and nearly of the same thickness throughout; anthers y e lW s h
Fertile flowers with 6-8 stamens. Ovaries. 6 -1 0 .-T h e variety ƒ we have
only seen m fruit The stipes are more than half the length of the strongly
nbbed carpels; and the persistent style is as long as the stipe. In other
respects the resemblance to T. dioicum is very striking.-T. purpurascens
DC. is referred to this species; but we are not certain that his plant is the
same as that of Linnaeus. , 1 4
4 T. Cornuti (Linn.): dioecious or polygamous ; filaments subclavate •
anthers oblong, obtuse; leaves sessile (the petiole divided to the base! ter
nately decompound; leaflets roundish-obovate or elliptical, 3-lobed with the
lobes rather acute, glaucous or pubescent beneath; peduncles longer than
the leaves, carpels subsessile, ribbed, twice as lone1 as the stvle • qfiorm
linear. Linn. sp. p. 768; Pursh ! fl. 2. p. 388; Hook.! fl. Bor.-Am. I p.
3 t. 2. T. pubescens, P u rsh ! 1. c. T. revolutum ! & T. corynellum,
DC. prodr. 1. p. 12. T. polygamum, Muhl. f cat. ed. 2. p. 56. T. nigo-
sum, Ait. Kew. (ed. 1.) 1. p- 262. T. purpurascens, P u rsh ! in herb. Bart.
T. rugosum &- Cornuti, Da rlin g t.! ji. Cest.jp. 334. .
Banks of rivers and in wet meadows, Canada (lat. 56 ) to (jreorgxa;
Western States! June-July.—Stem 3-6 feet high, branching. Leaves very
laro-e always sessile; divisions of the petiole elongated. Leaflets variable
in liz’e form, and pubescence, ovate, elliptical, or roundish; often cordate at
the base, but sometimes cuneiform ; the veins scarcely prominent, or eleva-
ted and rugose 5 margin commonly revolute. Panicle compound. Sepals
white oblong, small. Filaments more or less clavate; anthers sometimes
linear-oblong and slightly pointed. Carpels glabrous, about 3 lines long.
5 T alpinum (Linn.): flowers perfect, in a simple raceme, nodding;
filaments filiform ; anthers oblong-linear ; stem simple, nearly naked; leaves
biternate; leaflets glabrous ; stigma linear; carpels ovate, sessile.—Linn. sp.
®. 767; DC. syst. l. p. 175. .
Canada, K a lm ; Island of Anticosti, Pursh! (v. s. m herb. Shepherd);
Newfoundland, Banks ; Greenland, Hornemann.—Plant scarcely a span
high. Leaves mostly radical, petiolate ; leaflets about one-third of an inch
long roundish, subcoriaceous, crenately toothed. Stem scapiform. Raceme
6- 10-flowered: pedicels slender. Sepals 4, oblong. Ovaries f ew : styles
almost wanting: stigmas thick and pubescent.—The American plant exactly
resembles our specimens of T. alpinum from the North of Europe.
*** Sepals petaloid, not caducous, longer than the stamens : root grumous.
6. T. ahemonoides (Michx.): root fasciculately tuberous; flowers few,
umbellate; floral leaves involucriform; radical ones biternate.—Michx.! fl.
1 p 322; DC. prodr. 1-. p. 15; Hook.fl. Bor.-Am. 1. p. 4 ; Juss. ann. mus.
3 p 249. t. 21. ƒ. 2; Darlingt.! fl. Cest. p. 333. Anemone thalictroides,
L in n .; Pursh, fl. 2. p. 387; Bart. fl. Am. Sept. 2. t. 4 4 ; Bot. mag. t.
Canada! to N. Carolina! & Western States! April-May.—Root composed
o f 4-6 clavate tubers. Radical leaves on long petioles: cauline leaves 1-3,
sessile, trifoliolate, verticillate; leaflets petiolulate, roundish, obtusely 3-5-lob-
ed. Stems 4-8 inches high, commonly several from one root. Peduncles
3-6, one-flowered, 1-2 inches long. Flowers nearly an inch in diameter. Sepals
6-10, elliptical, white, sometimes slightly tinged with purple. Filaments
filiform, or somewhat clavate: anthers oblong. Ovaries 6-10: style
none: stigma simple. Carpels oblong, acute, prominently ribbed, substipitate.
—“Habit and frondeseence' of Isopyrum, with the inflorescence of Anemone,
and the fruit of Thalictrum.” DC.
In the herbarium of the late Rev. L. D. von Schweinitz are specimens of a Thalictrum,
which may be distinct from any of the preceding; but for want of the fruit,
it is here recorded only as a provisional species. .
7. T. nudicaule (Schwein. mss.)1: flowers perfect (or polygamous V) ; filaments
somewhat clavate; anthers oblong, obtuse; leaf solitary, radical, on a long petiole,
biternate; leaflets membranaceous, roundish, obtusely lobed, subcordate; stem slender,
nearly naked (tall), the summit a little branched, and bearing several 3-foliolate
leaves and a small few- (4-8-) flowered panicle ; stigma simple, sessile.
On rocks, Patrick county, Virginia, and on the Yadkin River, North Carolina,
Schweinitz .'—Stem 2 feet high. Leaflets glabrous, about three-fourths of an inch
long. Cauline leaves, at the summit of the stem, very small. Panicle as long as the
leaves. Flowers very small. Sepals 4-5, greenish, oblong. Ovaries 4-6, subsessile,
ovate, acute, pointed with the small simple stigma.