Erigeron oreganus |
Erigeron corymbosus |
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Gorge daisy, gorge fleabane, Oregon fleabane |
foothill daisy, longleaf fleabane |
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Habit | Plants perennial, 5–15 cm; taprooted, caudices unbranched. | Plants perennial, 15–40 cm; taprooted, often with slender, branching caudices. |
Stems | decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
erect or ascending, moderately hirsute to villous, eglandular. |
Basal leaves | persistent, obovate, 15–90 × 5–20 mm; margins coarsely serrate to shallowly lobulate; surfaces sparsely to moderately hirsute to strigose. |
usually persistent, linear to narrowly oblanceolate, 50–200 × 2–10 mm; margins entire, 1–3 prominent veins; tips usually acute; surfaces moderately to densely strigose, eglandular. |
Cauline leaves | obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
linear, 15–60 × 1–5 mm, gradually reduced distally. |
Involucres | 4–7 × 9–15 mm. |
4–7 × 8–14 mm. |
Ray florets | 30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
30–60, white to purple; rays 2.5–14 × 1–1.5 mm. |
Disc florets | corollas 3–5 mm. |
corollas 4–5 mm. |
Phyllaries | in 2–3 series, pale green with dark green medial stripe; surfaces remotely hirsute, strongly stipitate-glandular. |
in 2–3 series, usually with dark medial area; surfaces moderately to densely hirsute to villous, occasionally glandular. |
Fruits | 2–3 mm, moderately strigose; inner pappi of several unbarbed to weakly barbellate twisted bristles. |
2–3 mm, sparsely strigose; inner pappi of numerous barbellate bristles. |
Heads | 1–4, radiate. |
1–5(10) in corymb-like arrays, radiate. |
2n | =18. |
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Erigeron oreganus |
Erigeron corymbosus |
|
Distribution | ||
Discussion | Shady cliffs, rocky slopes, crevices. Flowering May–Aug. 100–400 m. Casc. WA. Native. This uncommon species is found only in the Columbia River Gorge. |
Dry open hillsides, sagebrush, pine forests. Flowering Jun–Aug. 200–2500 m. BR, BW, Casc, ECas, Lava, Owy. ID, WA; north to British Columbia, northeast to MT, east to WY, southeast to UT. Native. |
Source | Flora of Oregon, volume 2, page 259 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 255 James Riser, Stephen Meyers |
Sibling taxa | ||
Web links |