Anemone oregana |
Anemone piperi |
|||||
---|---|---|---|---|---|---|
blue windflower, bog anemone, Oregon anemone, Oregon windflower, western wood anemone, western wood anenome |
Piper's anemone, Piper's windflower |
|||||
Aerial shoots | 5-30(-35) cm, from rhizomes, rhizomes horizontal. |
10-35 cm, from rhizomes, rhizomes primarily vertical, occasionally strongly ascending. |
||||
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. |
(0-)1-2, ternate; petiole 10-20 cm; terminal leaflet sessile, rhombic, lanceolate, or oblanceolate, (1.5-)2.5-6 × (1-)2-4 cm, base narrowly cuneate, margins coarsely serrate to coarsely dentate on distal 1/2-2/3, apex acuminate to narrowly acute, surfaces pilose or glabrous; lateral leaflets unlobed or sometimes 1x-lobed; ultimate lobes 10-19 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 coarsely pilose distally; involucral bracts 3, 1-tiered, ternate, ±similar to basal leaves, bases distinct; terminal leaflet sessile, rhombic, lanceolate, or oblanceolate, (1.5-)2-5.5(-7) × (0.6-)1-2.5 cm, base narrowly cuneate, margins coarsely serrate to coarsely dentate on distal 1/2-2/3, apex acuminate to narrowly acute, surfaces pilose or glabrous; lateral leaflets unlobed or sometimes 1x-lobed; ultimate lobes (5-)8-18 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, rarely pinkish, elliptic-obovate to ovate, (6-)8-20 × 6-8 mm, glabrous; stamens 35-55(-90). |
||||
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 to obliquely ovoid, 3-4 × 1.5-2 mm, not winged, villous; beak straight or slightly curved, 0.5-1 mm, glabrous or proximally minutely puberulous, not plumose. |
||||
Heads of achenes | nearly spheric; pedicel (1.5-)2-5(-7) cm. |
nearly spheric; pedicel (1.5-)2-5 cm. |
||||
Anemone oregana |
Anemone piperi |
|||||
Phenology | Flowering spring–summer (Apr–Aug). | |||||
Habitat | Shaded, moist woods | |||||
Elevation | 400-3000 m (1300-9800 ft) | |||||
Distribution |
CA; OR; WA
|
ID; MT; OR; UT; WA; BC
|
||||
Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Plants of Anemone piperi from southeastern Washington and northeastern Oregon (i.e., the westernmost limits of the species) are sometimes intermediate between A. piperi and A. oregana. Although they possess vertical rhizomes characteristic of A. piperi, they have the bluish or pinkish sepals of A. oregana. These plants are best referred to A. piperi, pending detailed biosystematic analysis. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||
Key |
|
|||||
Source | FNA vol. 3. | FNA vol. 3. | ||||
Parent taxa | Ranunculaceae > Anemone | Ranunculaceae > Anemone | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | A. Gray: Proc. Amer. Acad. Arts 22: 308. (1887) | Britton ex Rydberg: Bull. Torrey Bot. Club 29: 153. (1902) | ||||
Web links |
|