Erigeron oreganus |
Erigeron chrysopsidis |
|
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Gorge daisy, gorge fleabane, Oregon fleabane |
dwarf yellow fleabane |
|
Habit | Plants perennial, 5–15 cm; taprooted, caudices unbranched. | Plants perennial, 3–20 cm; taprooted, usually with many woody, branching caudices. |
Stems | decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
erect; hirsute, eglandular to 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 in dense clusters, linear to narrowly oblanceolate, 10–80 × 1–3 mm; margins entire with hispid hairs; surfaces hirsute to hispid, sometimes nearing strigose. |
Cauline leaves | obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
abruptly reduced to (0)1–3 linear bracts. |
Involucres | 4–7 × 9–15 mm. |
4–7 × 10–16 mm. |
Ray florets | 30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
20–60; corollas with well-developed yellow rays, 4–8 × 0.5–2 mm, or tubular and short, or rays lacking. |
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, sparsely to moderately hispid-villous, often minutely glandular. |
Fruits | 2–3 mm, moderately strigose; inner pappi of several unbarbed to weakly barbellate twisted bristles. |
2–3 mm, moderately strigose; inner pappi of numerous barbellate bristles. |
Heads | 1–4, radiate. |
1, radiate or disciform. |
Erigeron oreganus |
Erigeron chrysopsidis |
|
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. |
Western United States. 3 varieties. |
Source | Flora of Oregon, volume 2, page 259 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 254 James Riser, Stephen Meyers |
Sibling taxa | ||
Subordinate taxa | ||
Web links |