Erigeron oreganus |
Erigeron aureus |
|
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Gorge daisy, gorge fleabane, Oregon fleabane |
golden fleabane |
|
Habit | Plants perennial, 5–15 cm; taprooted, caudices unbranched. | Plants perennial, 5–10 cm; fibrous-rooted, with short, usually unbranched caudices. |
Stems | decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
erect; hirsute to villous, 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, spatulate to oblanceolate, 10–50 × 5–10 mm; margins entire; surfaces moderately to densely strigose, eglandular to minutely glandular. |
Cauline leaves | obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
5–10 × 1–5 mm abruptly reduced, often a single linear bract. |
Involucres | 4–7 × 9–15 mm. |
4–6 × 10–15 mm. |
Ray florets | 30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
40–60, bright yellow; rays 4–6 × 0.5–1.5 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 purplish colored; surfaces moderately to densely woolly-villous, sparsely 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. |
2n | =18. |
|
Erigeron oreganus |
Erigeron aureus |
|
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. |
Ridges, talus, rocky slopes. Flowering Jul–Aug. 1600–2600 m. BW. WA; north to British Columbia, northeast to Alberta. Native. In Oregon, this native species is currently known only from a single collection in the Eagle Cap Wilderness, Wallowa Mountains. |
Source | Flora of Oregon, volume 2, page 259 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 252 James Riser, Stephen Meyers |
Sibling taxa | ||
Web links |