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

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 1x-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 1x-lobed; ultimate lobes 0.5-10 mm wide.

Heads

of achenes nearly spheric;

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

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.

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.

Anemone oregana

Distribution
from FNA
CA; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

(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.
A. 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.
A. oregana var. felix
Source FNA vol. 3.
Parent taxa 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
Subordinate taxa
A. oregana var. felix, A. oregana var. oregana
Name authority A. Gray: Proc. Amer. Acad. Arts 22: 308. (1887)
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