Erigeron oreganus |
Erigeron howellii |
|
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Gorge daisy, gorge fleabane, Oregon fleabane |
Howell's fleabane |
|
Habit | Plants perennial, 5–15 cm; taprooted, caudices unbranched. | Plants perennial, 20–45 cm; fibrous-rooted, rhizomatous, caudices branching or not. |
Stems | decumbent to erect; hirsute with unequal hairs, sparsely glandular. |
erect, glabrous to sparsely and minutely strigillose, eglandular. |
Basal leaves | persistent, obovate, 15–90 × 5–20 mm; margins coarsely serrate to shallowly lobulate; surfaces sparsely to moderately hirsute to strigose. |
persistent, broadly spatulate, 40–150 × 10–35 mm; margins entire or with few large teeth; surfaces glabrous, eglandular. |
Cauline leaves | obovate to elliptic; little or not reduced distally; surfaces sparsely to moderately hirsute. |
lanceolate to elliptic, 15–80 × 10–35 mm, gradually reduced distally; margins entire or with few coarse teeth; surfaces often ciliate or glandular. |
Involucres | 4–7 × 9–15 mm. |
5–9 × 15–23 mm. |
Ray florets | 30–60, pink to purple; rays 4–5 × 0.5–1 mm. |
25–50, white; rays 8–20 × 2.5–4 mm. |
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, with prominent central veins; surfaces glabrous, densely glandular. |
Fruits | 2–3 mm, moderately strigose; inner pappi of several unbarbed to weakly barbellate twisted bristles. |
2.5–3 mm, sparsely to moderately strigose; inner pappi of numerous barbellate bristles. |
Heads | 1–4, radiate. |
1, radiate. |
Erigeron oreganus |
Erigeron howellii |
|
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. |
Rocky slopes, open woods. Flowering May–Jul. 100–1500 m. Casc. WA. Native. |
Source | Flora of Oregon, volume 2, page 259 James Riser, Stephen Meyers |
Flora of Oregon, volume 2, page 258 James Riser, Stephen Meyers |
Sibling taxa | ||
Web links |