Erigeron oreganus |
Erigeron glaucus |
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Gorge daisy, gorge fleabane, Oregon fleabane |
seaside daisy, seaside fleabane |
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Habit | Plants perennial, 5–15 cm; taprooted, caudices unbranched. | Plants perennial, 3–30 cm; fibrous-rooted, rhizomatous, caudices usually simple, occasionally branching. |
Stems | decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
decumbent, procumbent or ascending, sparsely to moderately hirsute, usually minutely glandular. |
Basal leaves | persistent, obovate, 15–90 × 5–20 mm; margins coarsely serrate to shallowly lobulate; surfaces sparsely to moderately hirsute to strigose. |
persistent, obovate to broadly spatulate, 15–40 × 5–25 mm; margins entire; surfaces usually glabrous and eglandular. |
Cauline leaves | obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
similar to basal, 7–30 × 3–15 mm, gradually reduced distally. |
Involucres | 4–7 × 9–15 mm. |
5–10 × 10–21 mm. |
Ray florets | 30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
70–100, lavender to purple; rays 6–9 × 1–2 mm. |
Disc florets | corollas 3–5 mm. |
corollas 4–6 mm. |
Phyllaries | in 2–3 series, pale green with dark green medial stripe; surfaces remotely hirsute, strongly stipitate-glandular. |
in 3–4 series; surfaces moderately to densely villous, sparsely to moderately glandular. |
Fruits | 2–3 mm, moderately strigose; inner pappi of several unbarbed to weakly barbellate twisted bristles. |
2–3 mm, sparsely to moderately strigose; inner pappi of numerous barbellate bristles. |
Heads | 1–4, radiate. |
1(3), radiate. |
2n | =18. |
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Erigeron oreganus |
Erigeron glaucus |
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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. |
Coastal dunes, bluffs. Flowering May–Aug. 0–500 m. Est. CA. Native. |
Source | Flora of Oregon, volume 2, page 259 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 257 James Riser, Stephen Meyers |
Sibling taxa | ||
Web links |