Erigeron oreganus |
Erigeron disparipilus |
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Gorge fleabane, Oregon fleabane |
Snake River fleabane, white cushion 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 from a tap-root, 3-12 cm. high, the stem covered with very unequal, 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. |
Leaves nearly all in a basal cluster, finely stiff-hairy, linear or linear-oblanceolate, up to 4 cm. long and 2 mm. wide. |
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 solitary; involucres 5-7 mm. high, with spreading short hairs and often glandular as well; rays 30-60, white, pistillate, becoming pinkish, 5-10 mm. long and 1.5-2.3 mm. wide; disk flowers yellow; pappus of 15-25 capillary bristles. |
Erigeron oreganus |
Erigeron disparipilus |
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Flowering time | May-September | May-July |
Habitat | Moist shady cliffs and ledges. | Dry, rocky hillsides at low to middle elevations. |
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 the Snake River area in southeastern Washington; southeastern Washington to southeastern Oregon, east to southwestern Idaho.
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Origin | Native | Native |
Conservation status | Threatened in Washington (WANHP) | Sensitive in Washington (WANHP) |
Sibling taxa | ||
Web links |