Anemone quinquefolia

Linnaeus

Sp. Pl. 1: 541. 1753.

Common names: Wood anemone anémone &agrave cinq folioles
IllustratedEndemic
Treatment appears in FNA Volume 3.

Aerial shoots 5-30 cm, from rhizomes, rhizomes primarily horizontal. Basal leaves 0-1, ternate; petiole 4-25 cm; terminal leaflet ± sessile, rhombic to oblanceolate or obliquely oblanceolate, 1-4.5 × 1.4-3.7 cm, base narrowly cuneate, margins crenate-serrate, serrate, occasionally dentate or incised on distal 1/3-1/2, apex acuminate to obtuse, surfaces glabrous or puberulous to pilose; lateral leaflets unlobed or 1×-lobed or parted; ultimate lobes 4-15 mm wide. Inflorescences 1-flowered; peduncle puberulous, villous, or glabrous; involucral-bracts 3, 1-tiered, ternate, ±similar to basal leaves, bases distinct; terminal leaflet petiolulate or sessile, rhombic to oblanceolate or obliquely oblanceolate, 1-5 (-5.5) × 0.5-3 cm, base narrowly cuneate, margins crenate to serrate, serrate to dentate, occasionally incised on distal 1/3-1/2, apex acuminate to acute, surfaces glabrous or puberulous to pilose; lateral leaflets unlobed or 1×-lobed or parted, ultimate lobes 5-20 mm wide. Flowers: sepals (4-) 5 (-6), white, rarely pink, or abaxially white or tinged pink or blue and adaxially white, oblong to ovate, 6-25 × 4-8 mm, glabrous; stamens 30-60. Heads of achenes spheric or nearly so; pedicel 1-6 (-8) cm. Achenes: body ellipsoid or ovoid, 2.5-4.5 × 1-1.5 mm, not winged, puberulous or villous; beak straight to curved, rarely recurved, 0.5-2 mm, ±glabrous to sparsely puberulous, not plumose.

Distribution

Alta., Man., N.B., N.S., Ont., Que., Sask., Ala., Conn., D.C., Del., Ga., Ill., Ind., Iowa, Ky., Maine, Mass., Md., Mich., Minn., Mo., N.C., N.Dak., N.H., N.J., N.Y., Ohio, Pa., R.I., S.C., S.Dak., Tenn., Va., Vt., W.Va., Wis.

Discussion

Varieties 2 (2 in the flora).

Anemone quinquefolia and its relatives (A. grayi, A. lancifolia, A. lyallii, A. oregana, and A. piperi) are remarkably similar morphologically. Consideration of the sizes of various plant parts, degree of lobing of lateral leaflets, and orientation of the rhizome are particularly critical in distinguishing these species. This species complex also shares close morphologic affinities with both European (e.g., A. nemorosa Linnaeus) and Asian (e.g., A. altaica Fischer ex Ledebour) plants.

Selected References

None.

Key

1 Achene body 3–4.5 mm; lateral leaflets of basal leaves frequently 1×-lobed or -parted. Anemone quinquefolia var. quinquefolia
1 Achene body 2.5–3 mm; lateral leaflets of basal leaves unlobed or occasionally 1×-lobed. Anemone quinquefolia var. minima

"broadened" is not a number.

... more about "Anemone quinquefolia"
Acuminate (?) +  and Acute (?) +
Bryan E. Dutton +, Carl S. Keener +  and Bruce A. Ford +
Linnaeus +
distinct +
cuneate +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
straight +  and curved +
rudimentary +
less glabrous +  and sparsely puberulous +
not plumose +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
villous +  and puberulous +
ovoid;ellipsoid +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
globose;cylindric +
Wood anemone +, anémone &agrave +  and cinq folioles +
2-9-flowered +
Alta. +, Man. +, N.B. +, N.S. +, Ont. +, Que. +, Sask. +, Ala. +, Conn. +, D.C. +, Del. +, Ga. +, Ill. +, Ind. +, Iowa +, Ky. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Mo. +, N.C. +, N.Dak. +, N.H. +, N.J. +, N.Y. +, Ohio +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Va. +, Vt. +, W.Va. +  and Wis. +
sessile +  and pedicellate +
showy +  and inconspicuous +
0 cm0 mm <br />0 m <br /> (60 cm600 mm <br />0.6 m <br />) +
stalked +, sessile +  and aggregate +
ovoid;obovoid +
nearly;spheric +
axillary +  and terminal +
petiolate +, compound +  and simple +
whorled +, opposite +  and alternate +
palmate +  and pinnate +
serrate +  and crenate-serrate +
incised;crenate to serrate;incised;dentate +
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
glabrous +, villous +  and puberulous +
distinct +
conspicuous +
reduced +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
4 cm40 mm <br />0.04 m <br /> (25 cm250 mm <br />0.25 m <br />) +
not arillate +  and stalked +
blue and adaxially white;tinged pink;white;pink;blue and adaxially white;tinged pink;white;pink;white +
not persistent +
distinct +
oblong +  and ovate +
0.35 cm3.5 mm <br />0.0035 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Illustrated +  and Endemic +
persistent +
puberulous;pilose +
Anemonastrum +, Anemonidium +, Anemonoides +, Hepatica +, Jurtsevia +  and Pulsatilla +
Anemone quinquefolia +
species +
sessile;petiolulate;sessile +
5 cm50 mm <br />0.05 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
rhombic;oblanceolate or obliquely oblanceolate +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2-9-flowered +
herbaceous +  and woody +