Erigeron oreganus |
Erigeron speciosus(synonym of Erigeron subtrinervis) |
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Gorge daisy, gorge fleabane, Oregon fleabane |
showy daisy, showy fleabane |
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Habit | Plants perennial, 5–15 cm; taprooted, caudices unbranched. | Plants perennial, 15–75 cm; rhizomatous, fibrous-rooted, caudices branching. |
Stems | decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
erect; surfaces glabrous to rarely remotely hirsute, sometimes minutely glandular distally. |
Basal leaves | persistent, obovate, 15–90 × 5–20 mm; margins coarsely serrate to shallowly lobulate; surfaces sparsely to moderately hirsute to strigose. |
usually withering by flowering, oblanceolate to spatulate. |
Cauline leaves | obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
lanceolate, 20–80 × 5–15 mm, gradually reduced distally, bases ± clasping; margins entire, usually long-ciliate; surfaces glabrous, rarely remotely strigose. |
Involucres | 4–7 × 9–15 mm. |
3–7 × 11–16 mm. |
Ray florets | 30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
40–115+, lavender to purple; rays 7–11 × 0.7–1.5 mm. |
Disc florets | corollas 3–5 mm. |
2–3 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 orange stripe; surfaces basally hirsute to villous, occasionally minutely glandular. |
Fruits | 2–3 mm, moderately strigose; inner pappi of several unbarbed to weakly barbellate twisted bristles. |
2–3 mm, glabrous to sparsely strigose; inner pappi of numerous barbellate bristles. |
Heads | 1–4, radiate. |
1–5+ in corymb-like arrays, radiate. |
Erigeron oreganus |
Erigeron speciosus |
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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. |
Conifer forests, moist slopes, riverbanks, wet meadows. Flowering Jun–Sep. 50–2500 m. BR, BW, CR, WV. ID, NV, WA; north to British Columbia, northeast to Alberta, east to NE, 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 speciosus var. macranthus, Erigeron speciosus var. speciosus, Erigeron subtrinervis | |
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