Erigeron oreganus |
Erigeron compositus |
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Gorge fleabane, Oregon fleabane |
cutleaf daisy, dwarf mountain fleabane, fernleaf fleabane, trifid mountain 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, 3-25 cm. tall, the herbage densely glandular. |
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 trifid to ternately dissected; cauline leaves few, linear and entire. |
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 on long, nearly leafless stems, glandular and hairy; pistillate flowers 20-60, with usually white but occasionally pink or blue rays up to 12 mm. long and 2 mm. wide, or wanting; disk flowers yellow; pappus of 12-20 capillary bristles. |
Erigeron oreganus |
Erigeron compositus |
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Flowering time | May-September | May - August |
Habitat | Moist shady cliffs and ledges. | Sandy riverbanks at low elevations to rocky outcrops at mid- to high elevation in the mountains |
Distribution | Occurring in the Columbia River Gorge in Washington; Columbia River Gorge in Washington to adjacent Gorge area in Oregon.
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Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the northern Great Plains, also in northern and eastern Canada.
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Origin | Native | Native |
Conservation status | Threatened in Washington (WANHP) | Not of concern |
Sibling taxa | ||
Web links |
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