Erigeron oreganus |
Erigeron cascadensis |
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Gorge daisy, gorge fleabane, Oregon fleabane |
Cascade fleabane |
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Habit | Plants perennial, 5–15 cm; taprooted, caudices unbranched. | Plants perennial, 5–20 cm; taprooted with with woody, branching caudices. |
Stems | decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
ascending to erect, mostly glabrous to sparsely hirsute, sparsely 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 distinct rosettes, obovate to spatulate, 10–90 × 5–15 mm; margins entire or occasionally weakly dentate on distal portions; surfaces glabrous to remotely strigose, occasionally remotely glandular. |
Cauline leaves | obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
elliptic to oblanceolate, 7–25 × 2–6 mm, reduced distally. |
Inflorescences | 1–3 heads; terminal and axillary. |
|
Involucres | 4–7 × 9–15 mm. |
3–8 × 9–15 mm. |
Ray florets | 30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
30–50, white to occasionally purplish; rays 4–7 × 1–2 mm. |
Disc florets | corollas 3–5 mm. |
corollas 3–4 mm. |
Phyllaries | in 2–3 series, pale green with dark green medial stripe; surfaces remotely hirsute, strongly stipitate-glandular. |
in 2–3 series, often with purple medial or apical area; surfaces nearly glabrous or sparsely to moderately villous, eglandular or 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. |
radiate. |
Erigeron oreganus |
Erigeron cascadensis |
|
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. |
Shaded rocky slopes, cliffs, crevices, outcrops. Flowering May–Aug. 1200–2200 m. Casc. Native. Endemic to Oregon. This species is endemic to rocky areas in the Cascades from Douglas and Klamath counties only as far north as Marion County. |
Source | Flora of Oregon, volume 2, page 259 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 253 James Riser, Stephen Meyers |
Sibling taxa | ||
Web links |