Anemone oregana

A. Gray

Proc. Amer. Acad. Arts 22: 308. 1887.

Common names: Oregon anemone western wood anemone
IllustratedEndemic
Treatment appears in FNA Volume 3.

Aerial shoots 5-30 (-35) cm, from rhizomes, rhizomes horizontal. Basal leaves 0-1, ternate; petiole 4-20 cm; terminal leaflet sessile to petiolulate, oblanceolate to rhombic, oblong, or ovate, 1-5 (-6) × 0.7-2.5 (-3.5) cm, base narrowly cuneate, margins sharply serrate on distal 1/2 (-2/3), apex acuminate to acute, surfaces strigose to nearly glabrous; lateral leaflets unlobed or 1×-lobed; ultimate lobes 0.4-10 mm wide. Inflorescences 1-flowered; peduncle proximally glabrous, distally villous to pilose; involucral-bracts 3, 1-tiered, ternate, ±similar to basal leaves, bases distinct; terminal leaflet sessile to petiolulate, oblanceolate to rhombic, oblong, or ovate, 1-8 × 0.8-3 (-3.5) cm, bases narrowly cuneate to cuneate, margins crenate to serrate on distal 1/2 (-2/3), apex acuminate to acute, surfaces abaxially glabrous or strigose, adaxially nearly glabrous to strigose; lateral leaflets unlobed or 1×-lobed; ultimate lobes 0.5-10 mm wide. Flowers: sepals 5-7 (-8), blue to purple, reddish, or purple to pink (rarely nearly white or abaxially reddish, violet, or marginally purple, adaxially white), ovate, oblong, or elliptic, 10-20 × 5-8 (-10) mm, glabrous; stamens 30-75. Heads of achenes nearly spheric; pedicel (1.5-) 2-5 (-7) cm. Achenes: body oblong to ellipsoid, 4-5 × 1.5-2 mm, not winged, puberulous to pilose, rarely glabrous; beak ±straight, (0.5-) 1-1.5 mm, glabrous.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Stamens 30–60; abaxial color of sepals same as adaxial color; margins of involucral bracts similar to those of basal leaves. Anemone oregana var. oregana
1 Stamens 60–75; abaxial color of sepals different from adaxial color; margins of involucral bracts more coarsely serrate than those of basal leaves. Anemone oregana var. felix

"broadened" is not a number.

... more about "Anemone oregana"
Acuminate (?) +  and Acute (?) +
Bryan E. Dutton +, Carl S. Keener +  and Bruce A. Ford +
A. Gray +
distinct +
narrowly cuneate +  and cuneate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
straight +
rudimentary +
plumose +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
glabrous +, puberulous +  and pilose +
oblong;ellipsoid +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
globose;cylindric +
Oregon anemone +  and western wood anemone +
2-9-flowered +
Calif. +, Oreg. +  and Wash. +
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 +
spheric +
axillary +  and terminal +
petiolate +, compound +  and simple +
whorled +, opposite +  and alternate +
palmate +  and pinnate +
crenate;serrate +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
distally villous +  and pilose +
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 /> (20 cm200 mm <br />0.2 m <br />) +
Proc. Amer. Acad. Arts +
not arillate +  and stalked +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
blue;purple reddish or purple +
not persistent +
distinct +
5 +  and 7 +
elliptic +, oblong +  and ovate +
0.35 cm3.5 mm <br />0.0035 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
30 cm300 mm <br />0.3 m <br /> (35 cm350 mm <br />0.35 m <br />) +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Illustrated +  and Endemic +
persistent +
strigose adaxially nearly glabrous;strigose +
Anemonastrum +, Anemonidium +, Anemonoides +, Hepatica +, Jurtsevia +  and Pulsatilla +
Anemone oregana +
species +
sessile;petiolulate +
5 cm50 mm <br />0.05 m <br /> (6 cm60 mm <br />0.06 m <br />) +
3 cm30 mm <br />0.03 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1 cm10 mm <br />0.01 m <br /> (8 cm80 mm <br />0.08 m <br />) +
oblanceolate;rhombic oblong or ovate +
0.8 cm8 mm <br />0.008 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2-9-flowered +
herbaceous +  and woody +