Erigeron oreganus |
Erigeron linearis |
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Gorge daisy, gorge fleabane, Oregon fleabane |
desert yellow fleabane, lineleaf fleabane |
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Habit | Plants perennial, 5–15 cm; taprooted, caudices unbranched. | Plants perennial, 7–20 cm; taprooted, caudices branching. |
Stems | decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
erect or basally ascending, moderately to densely strigose, 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 to very narrowly oblanceolate, 15–80 × 0.5–2 mm, bases sheathing and light- or white-colored; margins entire; surfaces moderately to densely strigose, eglandular. |
Cauline leaves | obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
linear, 5–20 × 0.5–1 mm, usually reduced distally, bases sheathing. |
Involucres | 4–7 × 9–15 mm. |
5–8 × 9–13 mm. |
Ray florets | 30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
20–40, bright yellow; rays 5–7 × 1–2 mm. |
Disc florets | corollas 3–5 mm. |
corollas 3–5 mm. |
Phyllaries | in 2–3 series, pale green with dark green medial stripe; surfaces remotely hirsute, strongly stipitate-glandular. |
in 2–3 series; surfaces moderately to densely strigose; hirsute, or manicate, minutely 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(2), radiate. |
2n | =18, 27, 36, 45. |
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Erigeron oreganus |
Erigeron linearis |
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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. |
Rocky areas, sagebrush, juniper forests. Flowering May–Jul. 200–2500 m. BR, BW, Col, ECas, Lava, Owy. CA, ID, NV, 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 258 James Riser, Stephen Meyers |
Sibling taxa | ||
Web links |
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