Erigeron elegantulus |
Erigeron oreganus |
|
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dwarf blue fleabane, volcanic fleabane |
Gorge daisy, gorge fleabane, Oregon fleabane |
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Habit | Plants perennial, 4–10 cm; taprooted, with branching caudices. | Plants perennial, 5–15 cm; taprooted, caudices unbranched. |
Stems | erect to basally ascending, sparsely to moderately strigose, eglandular. |
decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
Basal leaves | persistent, linear to filiform, 20–50 × 0.5–1 mm, white, bases sheathing; margins entire; tips round to acute or acuminate; surfaces sparsely to moderately strigose. |
persistent, obovate, 15–90 × 5–20 mm; margins coarsely serrate to shallowly lobulate; surfaces sparsely to moderately hirsute to strigose. |
Cauline leaves | abruptly reduced and usually restricted to basal ? of stem, bases sheathing. |
obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
Involucres | 3–5 × 8–11 mm. |
4–7 × 9–15 mm. |
Ray florets | 15–30, lavender to purple; rays 3–8 × 0.7–1.3 mm. |
30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
Disc florets | corollas 2.5–3.5 mm. |
corollas 3–5 mm. |
Phyllaries | in 3–4 unequal series; surfaces sparsely strigose, eglandular. |
in 2–3 series, pale green with dark green medial stripe; surfaces remotely hirsute, strongly stipitate-glandular. |
Fruits | 1–2 mm, nearly glabrous to sparsely strigose; inner pappi of numerous barbellate bristles. |
2–3 mm, moderately strigose; inner pappi of several unbarbed to weakly barbellate twisted bristles. |
Heads | 1, radiate. |
1–4, radiate. |
2n | =27. |
|
Erigeron elegantulus |
Erigeron oreganus |
|
Distribution | ||
Discussion | Rocky areas, sagebrush, coniferous forests. Flowering Jun–Aug. 700–2500 m. BR, BW, Casc, Owy. CA. Native. |
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. |
Source | Flora of Oregon, volume 2, page 256 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 259 James Riser, Stephen Meyers |
Sibling taxa | ||
Web links |