Erigeron oreganus |
Erigeron caespitosus |
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Gorge fleabane, Oregon fleabane |
tufted 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. | Herbaceous perennial from a stout taproot, the stems curved at the base, 5-30 cm. tall; herbage densely pubescent 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 oblanceolate to spatulate, rounded or obtuse, triple-nerved; cauline leaves linear to ovate-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 solitary to several; involucre 4-7 mm. high, imbricate, glandular and short grey-hairy, the bracts narrow and thickened on the back; rays pistillate, 30-100, blue, white or pink, 5-15 mm. long; disk flowers yellow; pappus double, the outer short, the inner of 15-25 bristles. |
Fruits | Achene |
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Erigeron oreganus |
Erigeron caespitosus |
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Flowering time | May-September | June-August |
Habitat | Moist shady cliffs and ledges. | Dry, open, and often rocky places in 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; Alaska to Washington, Idaho, Utah, and Arizona, east to the northern Great Plains.
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Origin | Native | Native |
Conservation status | Threatened in Washington (WANHP) | Not of concern |
Sibling taxa | ||
Web links |