Erigeron oreganus |
Erigeron glacialis var. glacialis(synonym of Erigeron ursinus) |
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Gorge daisy, gorge fleabane, Oregon fleabane |
peregrine fleabane, subalpine fleabane |
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Habit | Plants perennial, 5–15 cm; taprooted, caudices unbranched. | Plants perennial, 20–50 cm; fibrous-rooted, often rhizomatous, caudices usually simple. |
Stems | decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
erect, nearly glabrous, or sparsely hirsute proximally to densely strigillose or pilose distally, eglandular. |
Basal leaves | persistent, obovate, 15–90 × 5–20 mm; margins coarsely serrate to shallowly lobulate; surfaces sparsely to moderately hirsute to strigose. |
persistent, linear-oblanceolate to broadly oblanceolate, 30–150 × 8–30 mm; margins entire; surfaces glabrous, eglandular. |
Cauline leaves | obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
lanceolate to oblanceolate, 10–80 × 3–30 cm, reduced distally, bases occasionally clasping; surfaces glabrous. |
Involucres | 4–7 × 9–15 mm. |
5–8 × 12–15 mm. |
Ray florets | 30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
30–60, lavender to purple; rays 5–9 × 1.5–4 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 2–3 series, with dark medial area, glabrous, densely glandular. |
Fruits | 2–3 mm, moderately strigose; inner pappi of several unbarbed to weakly barbellate twisted bristles. |
2–4 mm, sparsely to moderately strigose; inner pappi of numerous barbellate bristles. |
Heads | 1–4, radiate. |
1(4), radiate. |
Erigeron oreganus |
Erigeron glacialis var. glacialis |
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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. |
Meadows, streamsides, lakeshores, bogs. Flowering Jun–Sep. 800–3200 m. BR, BW, Casc, CR, ECas. CA, ID, NV, WA; north to AK, northeast to Alberta, east to WY, southeast to NM. Native. |
Source | Flora of Oregon, volume 2, page 259 James Riser, Stephen Meyers |
Flora of Oregon, volume 2 draft James Riser, Stephen Meyers |
Sibling taxa | ||
Synonyms | Erigeron peregrinus ssp. callianthemus, Erigeron peregrinus var. angustifolius, Erigeron peregrinus var. callianthemus, Erigeron peregrinus var. eucallianthemus, Erigeron peregrinus var. scaposus, Erigeron ursinus | |
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