RANUNCULACEAE 517 
Involucre mostly below the middle A Ape scape: tips of the 
achenes projecting beyond the wo 2. A. caroliniana. 
II. VIRGINIANAE 
Sepals greenish: head of dux mostly over 1 cm. thick : 
achene with a spreading styl 3. A. virginiana, 
Sepals clear white: head of fruit mostly less than 1 cm. . . 
thick: achene with an appressed or ascending style. 4. A. riparia. 
III. QUINQUEFOLIAE 
uere of the involucral bracts lobed or incised, mem- 
brano 5. A. quinquefolia. 
Divisions of the involucral bracts merely toothed, leathery 
at maturity. 6. A. lancifolia. 
1. A. RAUM b Plant 1-3 dm. tall: leaf-segments ovate to obovate 
or cuneate, 1-2 cm. long: bracts of the involucre very different from the 
: als : 
of fruit cylindric, 2-3.5 em. long: achene 
ch prairies, ravines, and 
buried in wool.—Ri 
hillsides, various MEE Ala. to Tex. and 
Ark.—( Me 
A. caroliniana Walt. Plant 1-2.5 dm 
G We wil 
= it 
ANS 
to those of the b sepal oid, 1, De 
long: Je ith a de ing tip. L Dr ry 
rich or pr) soil, various e Fla. to 
Tex., S. D., Wis., and N. C. 
a L. Plant 5-10 dm. tall: 
Ptr blades. 3- piae the pog ber 
lobed, incised and toothed: bracts of the involucre similar to the leaves: sepals 
greenish, mostly 8-13 mm. long, concave: head of fruit ellipsoid.—( THIMBLE- 
WEED. ) pe thickets, and woods, various provinces, Ga. to Ark., Alb., 
and N. S.—Sum 
4. A. riparia Fernald. Plant 3-9 dm. tall: leaf- n - -parted, ae Hee 
due less sharply incised n oothed than in A. braets of the 
nvoluere vid to eed Nds S: Ee mostly "20-30 1 mm. Men a ead o 
fruit cylindrie.— ( MOUNTAIN-THIMBLEWEED. IND-WAIF.)—Banks, often eal- 
yp stony soil, Blue "Ridge and more northern bre. N. 6. o Tenn., 
Alb d Que.— 
A. quinquefolia L. Plant 1-2.5 dm. tall: leaf- ioni, mainly lobed or 
par arted: braets of the rr deis e p the lea sepals white, usually: 
pe on the under side, m . long: "head of fruit globular, 1 
n diameter or less: puse Ee ss ‘than 4 mm. long, about 1.5 mm. 
vide QNremrcars. SNOWBOYS. 00D-ANEMONE.)—Moist woods and tuick- 
ets, various provinces, in Coastal Plain only N, Ga. to Ala., Ont., and N. S.— 
Spr.—Has been. pd with .4. nemorosa L. of Europe. 
6. A. Tug ve nis Plant 1—4 dm. tall: leaf- na merely toothed: sepals 
mainly 2-2.5 em. long: achene slightly over 4 mm —(MOUNTAIN-ANEMONE. ) 
Woods MORI m in Pi. soil, Blue Ridge, extending e adjoining provinces, Ga. to 
Pa. — (Eu. )—Spr. —Has been confused with A. trifolia L 
14. SYNDESMON Hoffmg. Perennial scapose herbs with tuberous roots. 
Leaf-blades 2-3-ternate. Flowers in an umbellate cluster, the involucre foli- 
