Anemone oregana |
Anemone okennonii |
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blue windflower, bog anemone, Oregon anemone, Oregon windflower, western wood anemone, western wood anenome |
Okennon's anemone |
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Aerial shoots | 5-30(-35) cm, from rhizomes, rhizomes horizontal. |
20-30 cm, from tubers, tubers ±vertical. |
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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. |
4-10, 2-3-ternate or irregularly so; petiole 5-10 cm; terminal leaflet petiolulate, obovate, 1.2-1.8(-20) × ca. 1.5(-2.5) cm, base narrowly cuneate, margins coarsely serrate to nearly incised on distal 1/2, ciliate or not, apex broadly acute, surfaces nearly glabrous; lateral leaflets 1-2x-lobed or -parted; ultimate lobes 2-5 mm wide. |
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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-)2-3-flowered cymes; peduncle proximally nearly glabrous, distally downy; involucral bracts primarily 3, (1-)2-tiered, simple, dissimilar to basal leaves, obtriangular, 3-cleft to pinnatifid, 2-5 cm, bases clasping, ±connate, margins incised throughout, apex acuminate, surfaces appressed-pilose; segments primarily 3, linear; lateral segments unlobed or 1x-lobed; ultimate segments 1-2 mm wide. |
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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 7-11, greenish white to abaxially reddish, oblong, 6-12(-14) × (2-)3-4.5 mm, abaxially hairy, adaxially glabrous; stamens 35-55. |
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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 ovate, flat, not winged, densely white-villous (with long tuft of hairs at base); beak ±straight, ca. 1 mm, hidden in achene indument, white-tomentose, not plumose. |
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Heads of achenes | nearly spheric; pedicel (1.5-)2-5(-7) cm. |
oblong-ellipsoid; pedicel 10-18 cm. |
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Anemone oregana |
Anemone okennonii |
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Phenology | Flowering spring (Mar–Apr). | |||||
Habitat | Dry, open ledges and slopes | |||||
Elevation | 500-1500m (1600-4900ft) | |||||
Distribution |
CA; OR; WA
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TX |
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 3. | FNA vol. 3. | ||||
Parent taxa | Ranunculaceae > Anemone | Ranunculaceae > Anemone | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | A. tuberosa var. texana | |||||
Name authority | A. Gray: Proc. Amer. Acad. Arts 22: 308. (1887) | Keener & B. E. Dutton: Sida 16: 198. (1994) | ||||
Web links |