Erigeron oreganus |
Erigeron corymbosus |
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Gorge fleabane, Oregon fleabane |
foothill fleabane, longleaf 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. | Perennial with a tap-root, 1-5 dm. tall, sub-erect, generally purplish at the base, the herbage covered densely with short, spreading 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 triple-nerved, elongate, acute, tapering gradually below, up to 25 cm. long including the petiole, and 1 cm. wide; cauline leaves reduced. |
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 1-16 in an open inflorescence; involucres 5-7 mm. high, grey-hairy, its bracts somewhat imbricate; rays 35-65, pistillate, deep blue or occasionally pink, 7-13 mm. long; pappus double, the inner of 20-30 bristles. |
Erigeron oreganus |
Erigeron corymbosus |
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Flowering time | May-September | June-August |
Habitat | Moist shady cliffs and ledges. | Open, usually dry places, often among sagebrush. |
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 east of the Cascades crest in Washington; southern British Columbia to eastern Oregon, east to Montana, Wyoming, and Utah.
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Origin | Native | Native |
Conservation status | Threatened in Washington (WANHP) | Not of concern |
Sibling taxa | ||
Web links |