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blue windflower, bog anemone, Oregon anemone, Oregon windflower, western wood anemone, western wood anenome

mountain pasqueflower, pulsatille, western anemone, western pasqueflower

Aerial shoots

5-30(-35) cm, from rhizomes, rhizomes horizontal.

10-60(-75) cm, from caudices, caudices ascending to vertical.

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 1x-lobed; ultimate lobes 0.4-10 mm wide.

(2-)3-6(-8), primarily 3-foliolate with each leaflet pinnatifid to dissected;

petiole 6-8(-12) cm;

terminal leaflet petiolulate, ovate in outline, (2.5-)3-6(-8) cm, base cuneate, margins pinnatifid to dissected throughout, apex narrowly acute, surfaces villous;

lateral leaflets 2x-parted, pinnatifid; ultimate segments 2-3 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 1x-lobed; ultimate lobes 0.5-10 mm wide.

1-flowered;

peduncle woolly or densely villous, glabrate;

involucral bracts 3, occasionally more, 1-tiered, ±similar to basal leaves, 3-foliolate, ovate in outline, bases distinct;

terminal leaflet petiolulate, 2.5-7 cm (2.5 cm in flower, 7 cm or less in fruit), margins pinnatifid throughout, apex narrowly acute, surfaces villous;

lateral leaflets 2x-parted, pinnatifid; ultimate segments 2-3 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.

sepals 5-7, white, tinged purple (rarely abaxially blue proximally, white distally, and adaxially white), ovate to obovate, rarely elliptic, 15-30 × 10-17(-19) mm, abaxially hairy, adaxially glabrous;

stamens 150-200.

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.

body ellipsoid, 3-4 × ca. 1.5 mm, not winged, villous;

beak curved or recurved, reflexed with age, (18-)20-40(-50) mm, long-villous, plumose.

Heads of achenes

nearly spheric;

pedicel (1.5-)2-5(-7) cm.

spheric, rarely cylindric;

pedicel 15-20(-22) cm.

2n

=16.

Anemone oregana

Anemone occidentalis

Phenology Flowering spring–summer (May–Aug/Sep).
Habitat Gravelly, rocky slopes, moist meadows
Elevation 500-3700 m (1600-12100 ft)
Distribution
from FNA
CA; OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; ID; MT; OR; WA; AB; BC
[WildflowerSearch map]
Discussion

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

W. J. Hooker (1829) included Anemone occidentalis in his concept of Anemone alpina Linnaeus.

The Thompson Indians and the Okanagan used decoctions prepared from the roots of Anemone occidentalis to treat stomach and bowel troubles (D. E. Moerman 1986).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Stamens 30–60; abaxial color of sepals same as adaxial color; margins of involucral bracts similar to those of basal leaves.
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.
var. felix
Source FNA vol. 3. FNA vol. 3.
Parent taxa Ranunculaceae > Anemone Ranunculaceae > Anemone
Sibling taxa
A. acutiloba, A. americana, A. berlandieri, A. canadensis, A. caroliniana, A. cylindrica, A. deltoidea, A. drummondii, A. edwardsiana, A. grayi, A. lancifolia, A. lyallii, A. multiceps, A. multifida, A. narcissiflora, A. occidentalis, A. okennonii, A. parviflora, A. patens, A. piperi, A. quinquefolia, A. richardsonii, A. tuberosa, A. virginiana
A. acutiloba, A. americana, A. berlandieri, A. canadensis, A. caroliniana, A. cylindrica, A. deltoidea, A. drummondii, A. edwardsiana, A. grayi, A. lancifolia, A. lyallii, A. multiceps, A. multifida, A. narcissiflora, A. okennonii, A. oregana, A. parviflora, A. patens, A. piperi, A. quinquefolia, A. richardsonii, A. tuberosa, A. virginiana
Subordinate taxa
A. oregana var. felix, A. oregana var. oregana
Synonyms A. occidentalis var. subpilosa, Pulsatilla occidentalis
Name authority A. Gray: Proc. Amer. Acad. Arts 22: 308. (1887) S. Watson: Proc. Amer. Acad. Arts 11: 121. (1876)
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