Erigeron oreganus |
Erigeron stanselliae |
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Gorge daisy, gorge fleabane, Oregon fleabane |
Stansell's fleabane |
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Habit | Plants perennial, 5–15 cm; taprooted, caudices unbranched. | Plants perennial, 7–25 cm; tap-rooted, caudices few-branched. |
Stems | decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
erect to decumbent, glabrous to sparsely strigose, sometimes minutely glandular. |
Basal leaves | persistent, obovate, 15–90 × 5–20 mm; margins coarsely serrate to shallowly lobulate; surfaces sparsely to moderately hirsute to strigose. |
linear to narrowly oblanceolate, 40–120 × 2–5 mm; margins entire; tips rounded to acute or acuminate; surfaces glabrous to sparsely strigose. |
Cauline leaves | obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
linear to narrowly elliptic, 5–40 × 1–3 mm, gradually or abruptly reduced distally; surfaces glabrous to loosely strigose. |
Involucres | 4–7 × 9–15 mm. |
5–7 × 5–11 mm. |
Ray florets | 30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
14–36, white to pinkish; rays 6–10 × 1–1.5 mm. |
Disc florets | corollas 3–5 mm. |
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; surfaces sparsely to densely pilose or strigose, minutely glandular. |
Fruits | 2–3 mm, moderately strigose; inner pappi of several unbarbed to weakly barbellate twisted bristles. |
3–4 mm, sparsely to densely strigose; inner pappi of numerous barbellate bristles. |
Heads | 1–4, radiate. |
1–2(4), radiate. |
Erigeron oreganus |
Erigeron stanselliae |
|
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. |
Serpentine areas. Flowering Jun–Jul. 700–900 m. Sisk. Native. Endemic to Oregon. First described in 2011, this serpentine endemic has thus far only been collected a few times in Curry County. The species is named in honor of noted Oregon botanist, Veva Stansell. |
Source | Flora of Oregon, volume 2, page 259 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 261 James Riser, Stephen Meyers |
Sibling taxa | ||
Web links |