Erigeron oreganus |
Erigeron acris |
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Gorge fleabane, Oregon fleabane |
bitter fleabane |
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Habit | Perennial from a stout, woody base and root, the lax stem 5-15 cm. long, covered with glands and loose, sticky hairs. | Biennial or perennial, 0.5-8 dm. tall, often covered with stiff, blunt hairs. |
Leaves | Basal leaves tufted, spatulate to obovate, coarsely toothed or incised, up to 9 cm. long and 2.5 cm. wide; cauline leaves well developed, broadly lanceolate to ovate or elliptic, up to 4 cm. long and 1 cm. wide. |
Basal leaves oblanceolate or spatulate, the cauline ones ample to strongly reduced, lance-ovate to linear-oblong; |
Flowers | Heads 1-several in a leafy inflorescence, the disk 9-13 mm. wide; involucre 5-7 mm. high, the bracts loose, equal, thin and green; rays 30-60, pink or white to bluish; disk corollas 3.4-4.7 mm. long, yellow; pappus simple, of 15-20 bristles that are curled and twisted above. |
Heads usually several on somewhat glandular, curved peduncles; involucral bracts tapered and pointed; rays pistillate, numerous, erect, inconspicuous, white, up to 4 mm. long and 0.4 mm. wide; inner pistillate flowers rayless; pappus surpassing the disk flowers. |
Erigeron oreganus |
Erigeron acris |
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Flowering time | May-September | June-September |
Habitat | Moist shady cliffs and ledges. | Meadows, forest openings, and open slopes from middle elevations to the subalpine. |
Distribution | Occurring in the Columbia River Gorge in Washington; Columbia River Gorge in Washington to adjacent Gorge area in Oregon.
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Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the northern Great Plains, Great Lakes region, and northeastern North America; circumboreal.
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Origin | Native | Native |
Conservation status | Threatened in Washington (WANHP) | Not of concern |
Sibling taxa | ||
Subordinate taxa | ||
Web links |
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